Answer:
The correct answer is a. photosynthesis.
Step-by-step explanation:
Photosynthesis is the process by which plant generally make it's food with the help of carbon oxide and water in the presence of sunlight. The light energy is entrapped by the chlorophyll pigment present in the chloroplast in the leaves.
Then this light energy is used to produce chemical food in the form of glucose and the process is called photosynthesis. Then this glucose is broken down to produce energy which is used by the leaves to grow.
The photosynthesis reaction is : 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂
Therefore the use of solar energy by plants to grow leaves is the example of photosynthesis. So the correct answer is a. photosynthesis.