You are presented with the question "What does plant plankton need for food?" and the following answer choices: 
- Sunlight
 - chemicals
 - glucose
 - warmth
 - Bodily water
 - photons
 - The Sun
 - Energy

Now knowing that phytoplankton are bacteria and algae that use sunlight to make food and phytoplankton, or plant plankton, needs sunlight to live, the same way plants on land do, choose the best answer.


 

 Sunlight        