In the following question, select the option that best expresses the meaning of the English idiom at the top of your lungs.

Introduction / Context:
This question tests your understanding of English idioms, which are fixed expressions whose meanings cannot always be guessed from the literal meanings of the individual words. The phrase at the top of your lungs is commonly used in spoken and written English, especially in narratives and conversations, and understanding it is important for good comprehension in exams and real life communication. The task is to select the option that correctly explains what this idiom means in normal usage.

Given Data / Assumptions:

• Idiom given: at the top of your lungs.• Four options describe different situations or states.• The question asks for the option that best expresses the meaning of the idiom.• We assume standard modern English usage.

Concept / Approach:
The phrase at the top of your lungs refers to the maximum capacity of a person's lungs when producing sound. In everyday English, this idiom is used to describe speaking or shouting with very high volume. It does not relate to smoking, suffocation, or physical tiredness directly. The correct approach is to recall typical sentences that native speakers use, such as The child was crying at the top of his lungs, which clearly means the child was crying very loudly. Matching the idiom with such common contexts helps eliminate wrong options.

Step-by-Step Solution:
Step 1: Focus on the word lungs, which are the organs used for breathing and producing voice.Step 2: The expression at the top of suggests something to the maximum extent or at the highest level.Step 3: Combine these ideas: at the top of your lungs indicates using your lungs to their full capacity when speaking or shouting.Step 4: Compare each option. Only Extremely loudly directly matches the idea of using one's lungs to the fullest while speaking.Step 5: The other options mention smoking, breathlessness, or suffocation, which relate generically to lungs but not to the idiom's actual figurative meaning.

Verification / Alternative check:
Insert the idiom in different sentences and check the sense. For example, The fans were cheering at the top of their lungs fits naturally if we understand it as extremely loudly. If we tried to interpret it as feeling suffocated or as being a habitual smoker, the sentences would sound strange and context would not support those meanings. Reference to common textbook explanations and dictionaries also confirms that the idiom means to speak or shout very loudly.

Why Other Options Are Wrong:
Be a habitual smoker confuses the physical organ lungs with the idiom, but the phrase is never used to describe smoking habits. Be breathless after an exhausting physical task talks about tiredness and heavy breathing, which is not about speaking or shouting. Feel suffocated in a very crowded place again relates to breathing discomfort, not to voice volume. None of these capture the idea of loudness that the idiom conveys.

Common Pitfalls:
Many learners get misled by words like lungs and try to connect the idiom with medical or physical conditions such as suffocation or smoking. Another mistake is to ignore the phrase at the top of, which points to an extreme degree, suggesting intensity rather than illness. To avoid such errors, always think of idioms in familiar example sentences and focus on how native speakers actually use them in stories and dialogues.

Final Answer:
The idiom at the top of your lungs means Extremely loudly.