Fact 1: Chlorophyll is used for absorbing light energy by plants.

Fact 2: Chlorophyll is a complex molecule.

Given the two facts above, answer the question "What sort of molecules are used for absorbing light energy by plants?" with the following options: 
- tiny
 - cellulose
 - photons
 - unique
 - messengers
 - chemicals
 - complex
 - similar


 

       complex  