Answer the following question given this paragraph: 

Algae is sometimes mocked as a source of fuel. But algae are a potentially wonderful source of power. They convert energy from the Sun into food by photosynthesis. Algae can be grown in desert areas where other crops cannot grow. Nutrients for algae may be wastes from other processes. Algae can be processed to be made into a liquid. There is a lot of research going on to harness algae for biofuels.


Q: Algae convert energy from the sun into food by means of what process?


A:
photosynthesis