Question

for example, if all of the ice and snow on earth disappeared, the fitness of polar bears would change. what is the best description of fitness? running fast and jumping high the ability to survive and reproduce growing tall and eating tree leaves

Explanation:

In biology, fitness refers to an organism's ability to survive and reproduce in its environment, passing on its genes to the next - generation. This is more fundamental than the other options which are specific physical traits or behaviors.

Answer:

the ability to survive and reproduce