Some viruses have an envelope of\nOptions:\n- (A) fats and proteins\n- (B) allow growth\n- (C) aerobic capacity\n- (D) keeps the organism warm\n- (E) wavelengths and photons\n- (F) Chemical energy\n- (G) looseness\n- (H) To keep their body heat.
Step-by-step reasoning process below:
(A)
Some viruses have an envelope of phospholipids and proteins.

Phospholipids are body fats, too.

Some viruses have an envelope of fats and proteins.

.

So, the answer is (A)