Fact 1: Phytoplankton are bacteria and algae that use sunlight to make food.

Fact 2: Food gives energy.

Given the two facts above, answer the question "What do phytoplankton and algae need in order to make energy?" with the following options: 
- water
 - glucose
 - food
 - sunlight
 - bacteria
 - Light
 - adding heat
 - The Sun


 

    sunlight     