I just took a test in school today. What question was I asked?

Question I was asked: What travels through the stem of a plant?

I just took a test in school today. What question was I asked?

Question I was asked: Soil erosion can be best prevented by

I just took a test in school today. What question was I asked?

Question I was asked:
Base your answers on the information below. One hot, summer day it rained very heavily. After the rain, a plastic pan on a picnic table had 2 cm of rainwater in it. Four hours later, all the rainwater in the pan was gone. Which process caused the rainwater in the pan to disappear as it sat outside in the hot air?