What are the importance of trees and fruit-bearing trees in our lives? Choose your answer carefully.
I. They release oxygen that we breathe.
II. They pollute the air.
III. They are a major source of food and medicine
IV. They contribute to flood and soil erosion.
V. All of the statements above are importance of trees.
a. I only b. I and III only c. I, II, III d. V only