Answer: To make food for the plants
Step-by-step explanation:
The homeostasis the process by which the plants maintain the various types of metabolic activities in their body. The plants maintain homeostasis by making food by the help of the process known as photosynthesis.
This process helps in producing glucose for the plant body which can be used to maintain the various cellular processes inside the plant body.
Hence, photosynthesis is essential for plant body to make food for the plant.