Imagine that a population of deer living on an island without any predators was threatened with overpopulation, until wolves were imported. after a couple of years, there were fewer deer, but their average running speed and length of their legs had increased. what process accounts for the change?

This is an example of natural selection. A population is BEST defined as all individuals of the same species, located in a given region of the world. The predators can recognize the color and, either through natural selection (if the prey is toxic) or learning (if the prey is merely unpalatable), avoid the prey.  

the right side of the picture going down is:

polymerase

protein

transport vesicle

modified protein

the left side of the picture going down is:

dna helix

single-stranded rna

endoplasmic reticulum

ribosome

golgi apparatus

protein released from vesicle

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not only is it colder, it also becomes darker, less salty, and more dense.