Phytoplankton are bacteria and algae that use sunlight to make food, and plants have a very clever way of using the energy from sunlight to make their food. Given these facts, phytoplankton have a clever way of making food from what among the following options:
- sunlight energy
 - water energy
 - heat energy
 - heat produced
 - chemical energy
 - mechanical energy
 - organic matter
 - refraction of light


 

 sunlight energy        