As you know, water evaporates in heat, and tropical places are usually very hot! Tropical implies "ocean" so, when an ocean evaporates it leaves a sandy ocean floor, which is a desert, but there are lake sized "puddles" of salt water left over, which is why there is a big salt water lake in the middle of Utah.
To look at him because that’s the answer
The first choice is correct
Too busy for her own good, Sarah was negligent about drinking enough water.
The other verb phrases would not fit the context of the sentence.
Expository development is explanatory information in a story.
