Which is the best example of natural selection? some insects in a population survive temperature changes and pass their traits on to their offspring. a deer population is rapidly killed off by a forest fire. a few mice from a population randomly die from a disease, while surviving mice are not able to reproduce and slowly die off. an injured bald eagle is captured and placed in a wildlife facility where it survives for 10 years.

Best answer is: 
Some insects in a population survive temperature changes and pass their traits on to their offspring

Natural selection is the slow process by which the fittest animals, meaning the animals most fit to survive and reproduce in their environment, pass on the genes because of these advantages. The insects that cans survive temperature changes demonstrate a fitness in their environment, which results in passing on these traits. 

It is evolution, because we all have some of the same traits like eye color or shape or ears.