Verbal Reasoning — Classification (Always/essential component): A “car” must always have which part? Consider structural essentials for a car, not situational elements like drivers or exterior trims. Choose the component that is invariably present.

Concept/Approach
Cars are wheeled motor vehicles; wheels are fundamental. A car can exist without a driver (parked, autonomous testing) and without particular body trims (bumper/bonnet styles vary), but it cannot be a car without wheels.

Option Analysis

• Driver — not essential (e.g., parked or autonomous vehicles).
• Wheels — structural necessity. Correct.
• Bonnet — body style dependent.
• Bumper — trim; not invariant.

Final Answer
Wheels.