Select the related word that best completes the analogy: Sanitation is related to Illness in the same way as Care is related to which of the following?

Introduction / Context:
This analogy question examines understanding of cause and prevention relationships. Sanitation and illness are linked through the idea that good sanitation reduces or prevents illness. The second part of the analogy asks how care relates to a similar undesirable outcome. Recognising that some actions help prevent negative results is a key skill in verbal reasoning questions, especially those used in aptitude tests and competitive examinations.

Given Data / Assumptions:
- Sanitation refers to cleanliness measures and systems that protect public health.
- Illness refers to disease or poor health that can result from poor hygiene and contamination.
- Care here means careful behaviour or attention that can prevent harm or negative events.
- We are looking for an outcome that is reduced or avoided when proper care is taken.

Concept / Approach:
In the pair Sanitation : Illness, the relationship is preventive rather than equal or opposite. Greater sanitation tends to decrease the chances of illness. Thus, the pattern is preventive measure to undesirable consequence. To mirror this, we need a word that is prevented by care. When people exercise care in their actions, they lower the risk of accidents. Words such as rest or suggestion do not describe negative outcomes that are prevented by care in the same clear way. The correct choice must be something harmful or unwanted that is controlled through careful behaviour.

Step-by-Step Solution:
Step 1: Interpret the first pair. Good sanitation reduces illness, while poor sanitation increases it. Step 2: Understand that the relationship is preventive: more sanitation means less illness. Step 3: Evaluate option A, Rest. Care does not prevent rest; in fact, care may encourage appropriate rest. Step 4: Evaluate option B, Ignore. Care and ignore are opposite ways of acting, not a measure and a consequence. Step 5: Evaluate option C, Accident. Careful behaviour, such as obeying rules and paying attention, reduces the risk of accidents. Step 6: Evaluate option D, Suggestion. Suggestions are ideas or proposals and are not prevented by care. Step 7: Conclude that Care : Accident mirrors the relationship Sanitation : Illness as preventive action to negative outcome.

Verification / Alternative check:
We can check the structure by forming statements such as Good sanitation helps prevent illness and Good care helps prevent accidents. Both sentences make sense and present the same logical pattern. Trying to substitute rest, ignore, or suggestion in the second sentence does not give the same meaning. Care helps prevent rest is not a natural or accurate statement, and care does not target suggestions in any special way. Therefore accident is the only option that correctly completes the analogy.

Why Other Options Are Wrong:
Rest is generally positive and is not a negative outcome that must be prevented by care. Ignore is a verb that contrasts with care, giving an antonym relationship instead of a preventive one. Suggestion is a neutral noun that simply refers to an idea or advice; it does not stand for a harmful event that care seeks to avoid. Only accident represents an unwanted event that is prevented or reduced by carefully following rules and remaining attentive.

Common Pitfalls:
A common mistake is to look for antonyms or simple associations instead of thinking about how one word influences the other. Some learners might be distracted by the apparent opposition between care and ignore and wrongly select that pair. Others may not examine whether the second word is negative or undesirable. To avoid this, always identify whether the original pair is synonym, antonym, part whole, cause effect, or prevention related. Once you classify the relationship correctly, it becomes easier to identify the matching pair.

Final Answer:
Sanitation reduces illness just as care reduces the chance of an accident, so option C is the correct completion of the analogy.