Why are coastal areas cooler during the day than inland areas?

Large bodies of water tend to keep an area cooler. 

The answer is A cool breeze blows from the sea during the day because Land heats up faster than the ocean. It also loses heat faster than the ocean. During the day, the sea is cooler than the land. A cool breeze blows from the sea during the day. So coastal areas are cooler during the day than areas that are inland.

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Answer( solar wind );