Cup is related to Lip in the same way as Bird is related to which body part in this everyday analogy?

Introduction / Context:
This analogy builds on the relationship between an object and the edge or part that it touches during normal use. A cup touches the lip when a person drinks from it. In a similar way, a bird uses a particular part of its body to pick up food or interact with its surroundings. Solving this question requires recognising the parallel between lip and the corresponding bird part.

Given Data / Assumptions:

• Analogy: Cup : Lip :: Bird : ?
• Options: Grass, Forest, Beak, Bush.
• A cup is an object that meets the lip of a person when drinking.
• A bird uses its beak as the point of contact with food and other objects.
• The relationship involves the part that comes into contact during action.

Concept / Approach:
The link between cup and lip is not ownership but contact: when you drink, the rim of the cup touches the lip. For a bird, the analogous contact point is the beak, which meets food, water, or other objects. Grass, forest, and bush are environments where birds may live, but they are not parts of the bird. Therefore, beak is the only option that mirrors lip as a body part at the interface of an action.

Step-by-Step Solution:
Step 1: Consider cup and lip. The lip is the body part that directly contacts the cup during drinking. Step 2: Identify the type of relationship: object of use to the body part that touches it. Step 3: Now consider a bird. When a bird eats or drinks, it uses its beak to pick up food or water. Step 4: Among the options, beak is the only body part of the bird. Grass, forest, and bush are places where the bird might be found but not parts of the bird. Step 5: Align the relationships: Cup touches Lip. Bird uses Beak. Both identify the active point of contact in a routine action.

Verification / Alternative check:
Write the full analogy: Cup : Lip :: Bird : Beak. In each pair, the second word is a body part that serves as the contact surface in a typical interaction: the lip touches the cup and the beak touches food or other objects. None of the remaining options provide a similar body part relationship, so beak fits perfectly.

Why Other Options Are Wrong:
Grass: Grass is part of the environment, not part of the bird. It does not parallel lip as a body part. Forest: A forest is a habitat, not an anatomical feature of the bird. Bush: Bush is also part of the environment or vegetation and has no direct body part connection analogous to lip.

Common Pitfalls:
Some learners may mistakenly think in terms of habitat and choose forest or bush because birds live among these. However, the first pair clearly links an object to a body part, not a habitat. Always identify the exact nature of the relationship in the first pair before selecting the second pair.

Final Answer:
The correct completion of the analogy is Beak, giving Cup : Lip :: Bird : Beak.