You are presented with the question "what is energy passed up from to higher trophic levels?" and the following answer choices: 
- animals
 - Energy
 - autotrophs
 - Most plants
 - glucose
 - sunlight
 - Energy.
 - kinetic energy

Now knowing that energy is passed up a food chain or web from lower to higher trophic levels and autotrophs are the base of the food chain , choose the best answer.


 

   autotrophs      