Fact 1: Plants release oxygen during the day but not during the night.

Fact 2: Oxygen exchange is needed for plant respiration.

Given the two facts above, answer the question "What do plants do during the day?" with the following options: 
- Exfoliation
 - amble
 - bite animals
 - produce light
 - grass
 - reproduce
 - sweating
 - respirate


 

        respirate 