You are presented with the question "Some viruses have an envelope of" and the following answer choices: 
- fats and proteins
 - allow growth
 - aerobic capacity
 - keeps the organism warm
 - wavelengths and photons
 - Chemical energy
 - looseness
 - To keep their body heat.

Now knowing that some viruses have an envelope of phospholipids and proteins and phospholipids are body fats, too, choose the best answer.


 

 fats and proteins        