Fact 1: Energy is passed up a food chain or web from lower to higher trophic levels.

Fact 2: An example of chemical energy is food nutrients.

Given the two facts above, answer the question "_ are passed from lower to higher trophic levels" with the following options: 
- fossil fuels
 - rays or beams
 - nutrients
 - environment
 - animals
 - heat produced
 - Most plants
 - Light


 

   nutrients      