A car is to a traffic light what the sun is to:

A. a solar eclipse.
B. a solar panel.
C. a star.
D. a mirror.

What is the best answer and please explain why?
While all of them are bad analogies and the correct answer should be None of the above, but out of all of the choices, A is the best answer.

From an observer on earth, a solar eclipse would control the amount of light which reaches Earth, just like traffic lights control the amount of car traffic on the road, although that is still quite a stretch.
very cool. thank you very much.
None of the analogies really apply, for a car is nothing to a traffic light. If the analogy was the other way around, 'a traffic light is to a car', then you could start to create analogies as a traffic light has some influence over the behaviour of a car. In this case, the 'traffic light is to a car like the sun...' is to a solar panel, which controls its output.