Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: 
Living things that undergo photosynthesis and produce glucose include plants, cyanobacteria, and algae.


Question: Plants, cyanobacteria, and algae are living things that undergo what process and produce glucose?
photosynthesis
Photosynthesis.