Staying warm has a positive impact on an animal 's survival.
Furry animals grow thicker coats to keep warm in the winter.
Furry animals grow thicker coats which has a positive impact on their survival. .
Furry animals grow thicker coats which has what impact on their survival?
Options:
[1] heat
[2] positive
[3] negative
[4] energy
[5] ironic
[6] Energy.
[7] decreased
[8] adding heat