Match the following.

	Column I		Column II
A)	Water	i)	Release of metabolic energy
B)	Oxygen	ii)	Extension growth
C)	Nutrient	iii)	Affect enzymatic reaction
D)	Temperature	iv)	Synthesis of protoplasm, act as source of energy

	A	B	C	D
1.	ii	i	iv	iii
2.	iii	i	iv	ii
3.	i	iii	ii	iv
4.	iv	ii	i	iii

Water is responsible for the extension growth. Oxygen helps in releasing metabolic energy essential for growth activities. Nutrients are required for synthesis of protoplasm, act as source of energy. Temperature is required for the optimum function of enzymes. It affect the enzyme action.