In the analogy "Car : steering wheel :: motorcycle : ____", which part controls the direction of a motorcycle?

Introduction / Context:
This verbal analogy tests your understanding of the relationship between a vehicle and the main part used to steer and control its direction. In the pair "Car : steering wheel", the second word names the key control device that the driver uses to turn and guide the car. You must extend the same type of relationship to a motorcycle and select the part that plays an equivalent role for a rider.

Given Data / Assumptions:

• A car is steered by using a steering wheel.
• A motorcycle is steered by using a specific front control assembly.
• Other motorcycle parts like engine, tyre, seat and headlight are important but not used primarily for steering.
• The question follows a simple pattern: vehicle : main steering control.

Concept / Approach:
For a car, the steering wheel is the circular control that the driver rotates to change direction. For a motorcycle, the rider turns the front assembly using the handle bar. The handle bar is the horizontal bar fixed to the front fork that the rider grips with both hands. By pushing or pulling on the handle bar, the rider turns the front wheel to the left or right, which steers the motorcycle. Therefore, handle bar is to motorcycle as steering wheel is to car.

Step-by-Step Solution:

Identify the pattern in the first pair: car is related to its steering wheel. Recognise that the relationship is "vehicle : primary steering control". List key motorcycle parts: engine, tyres, seat, headlight and handle bar. Note that only the handle bar is directly gripped and turned by the rider to steer the motorcycle. Conclude that handle bar fits the same functional role as steering wheel in the given analogy.

Verification / Alternative check:
The engine provides power but it does not steer the motorcycle. Tyres make contact with the road but are not directly used for steering by the rider. The seat supports the rider and the headlight provides illumination. None of these parts match the specific steering function. Only the handle bar is used to control direction, so it correctly parallels the steering wheel of a car.

Why Other Options Are Wrong:
Tyre, engine, seat and headlight are all important vehicle parts, but they do not serve as the main steering control. Selecting any of them would change the type of relationship and break the pattern that the first pair establishes. The analogy demands a direct functional match, which only the handle bar provides.

Common Pitfalls:
A common mistake is to pick any motorcycle part that feels important, such as the engine, without checking whether it mirrors the car steering wheel in function. Another pitfall is to overthink the question and imagine rare or modified vehicle designs. In standard reasoning questions, focus on everyday usage and the most common control parts.

Final Answer:
The correct completion of the analogy is "Car : steering wheel :: motorcycle : handle bar".