Fact 1: Chloroplasts contain the green pigment chlorophyll.

Fact 2: Animals lack chloroplasts.

Given the two facts above, answer the question "what do animals lack?" with the following options: 
- hearts
 - skin cells
 - h2o
 - the body's largest organ
 - organic matter
 - characteristics
 - green pigment chlorophyll
 - Chemical energy


 

       green pigment chlorophyll  