Answer the following question given this paragraph: 

The primary function of leaves is to collect sunlight and make food by photosynthesis. Specialized tissues in leaves work together to perform this function. In a deciduous plant, leaves seasonally turn color and fall off the plant. They are replaced with new leaves later in the year. An evergreen plant keeps its green leaves year-round. It may have needle-like leaves to reduce water loss.


Q: The primary function of leaves is to collect sunlight and make food by what process?

 Choices:

- nuclear fission

- osmosis

- duplicate process

- photosynthesis

A:
photosynthesis
