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

Fact 2: Plants represent the first trophic level.

Given the two facts above, answer the question "What passes energy up the food chain to adult vegans?" with the following options: 
- cows
 - animals
 - Batteries.
 - chickens
 - Power companies.
 - glucose
 - Humans.
 - Plants.


 

        Plants. 