what can generate little bursts of heat by shivering?
rabbit goats bears humans clouds trees animals the sun
A B C D E F G H
All humans are mammals.
humans can generate little bursts of heat by shivering
what can generate little bursts of heat by shivering? (A) rabbit (B) goats (C) bears (D) humans (E) clouds (F) trees (G) animals (H) the sun