Answer:
To increase the surface area.
Step-by-step explanation:
Mitochondria is known as the energy house of the cell. The formation of ATP occurs in the mitochondria in the firm of aerobic respiration. Mitochondria is the semi autonomous organelle that contains its own DNA.
The mitochondria contains the outer and inner membrane. The inner membrane is folded into finger like projections known as cristae. These helps in increasing the surface area of the inner membrane and increases the rate of electron transport chain.
Thus, the answer is to increase the surface area.