Question

these lights are too cool!
physical science studies: wave interactions
cities around the country have been using some new traffic lights. these lights last longer and use less energy. so cities save money. but the bulbs dont burn hot enough to melt snow. this can cause problems for drivers.
the traffic lights use led bulbs. these bulbs use much less energy than those used in most traffic lights. thats good for the environment. its also good for cities. since the bulbs use less energy, they last for seven or more years. other bulbs need to be changed every 12 to 18 months.
what else is good about led traffic lights? they dont waste energy by making heat. this is also a problem, however. why? the lights dont melt snow. wet snow can
think about the news story. which fits best in the empty box above?
a. some cities are switching to led traffic lights.
b. city workers need to clean led traffic lights.
c. drivers do not like new led traffic lights.
d. led traffic lights dont burn hot enough to melt snow.

Explanation:

The text on the left side of the image mentions that the new traffic lights (LED) have certain characteristics. The top - left box in the right - side diagram is likely to be a general statement about the adoption of these lights. Option A "Some cities are switching to LED traffic lights" is a general statement that can be inferred from the first sentence of the left - side text "Cities around the country have been using some new traffic lights". The other options (B, C, D) are more specific details (cleaning, driver's preference, snow - melting issue) rather than a general statement that would fit in the top - left box which is likely to be an overarching idea.

Answer:

A. Some cities are switching to LED traffic lights.