Mammals can also generate little bursts of heat by shivering.
Most mammals can be active even in cold weather because they are warm-blooded.
Warm-blooded animals can stay active in cold by shivering. .
which can help warm-blooded animals stay active in cold?
Options:
[1] shivering
[2] four limbs
[3] Animal fur
[4] sleep
[5] sweating
[6] hibernation
[7] cold blood
[8] fur seals