Question

today, wind power is used around the world. in fact, its used in some places in the united states. how does it work? the wind spins blades on a giant wind tower. the spinning blades cause a shaft to turn. the shaft spins a device known as a generator, which makes electricity.
of course, wind towers work best where there are strong winds. the best locations are along coasts, on hilltops and mountains, and across open areas of land such as plains.
check your understanding
where do wind towers work best?

• highlight in yellow the sentence that describes the best wind conditions.
• highlight in red the sentence that tells where the best wind conditions can be found.

Explanation:

The text explicitly states the best wind conditions and their locations. The sentence describing the best wind conditions is about strong winds, and the one telling where these conditions are found lists specific locations.

Answer:

• Sentence to highlight in yellow: "Of course, wind towers work best where there are strong winds."
• Sentence to highlight in red: "The best locations are along coasts, on hilltops and mountains, and across open areas of land such as plains."