______________ is a mixture of decayed plants, vegetables or food, etc. that can be added to soil to improve its quality.
Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
______________ is a mixture of decayed plants, vegetables or food, etc. that can be added to soil to improve its quality.
A. Chemical fertilizer
B. Pesticide
C. Compost
D. Waste