13. Any organic or inorganic material of natural or synthetic
origin, which is added to the soil to supply certain elements essential to plant growth.
A. Fertilizer
B. Manure
C. Decayed plants
D. Compost

14. Planting trees helps beautify the environment. Which of the following statements below matches the thought of the underlined word?
A. Planting trees earns money from selling
B. People admired for being diligent in caring for the trees
C. Trees planted in the community contribute to having fresher air
D. The trees that surround the house help place to look very
attractive

15. Which is not an importance of planting and propagating trees and fruit-bearing trees?
A It provides us food such as fruits and nuts.
B. It is a major source of fuel for heating and cooking.
C. It gives us ahade against sunlight and their roots help to
prevent flooding
D. It consumes lots of water so it's a waste of time planting
them​