1.What is the most important factor which affects the growth of the trees. It has been observed that varieties of trees grow best in certain climatic conditions.
A. Climate
B. Temperature
C. Soil
D. Air

2.The growth of the plants depends upon the degree of how cold or hot the atmosphere is at certain period of time.
A. Air
B. Temperature
C. Plant
D. Soil

3.It is the main provider of energy in the process of food manufacture of the plant
A. Sunlight
B. Temperature
C. Plant
D. Climate