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

Question I was asked: Which of the following has the greatest effect on the ability of soil to hold water?

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

Question I was asked: Why is protein an important part of a healthy diet?

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

Question I was asked:
Salt and pepper are placed together in a container. When the container is shaken, the salt and pepper become a