Fact 1: Energy enters ecosystems in the form of sunlight or chemical compounds.

Fact 2: Biomes are global ecosystems.

Given the two facts above, answer the question "Where does energy enter into in the form of sunlight and chemical compounds?" with the following options: 
- sun
 - science lab
 - biomes
 - orchids
 - photons
 - deserts
 - black hole
 - trees


 

   biomes      