Staying warm has a positive impact on an animal 's survival.
Adaptive traits improve the chance of surviving and reproducing.
Staying warm has a positive impact on an animal's chances for reproduction.
Staying warm has a positive impact on an animal's chances to:
[a] die
[b] moves
[c] protect them
[d] cave
[e] fur
[f] Reproduction
[g] reproduce
[h] growth