Which of the following is an accurate definition of the theory of evolution ?

you weren't very specific, but its the process by which organisms change over time as a result of changes in heritable physical or behavioral traits. hope this helped <3

Since you didn’t list the options, I’ll just give you a basic overview, then you can choose the one that fits the best.

Evolution has two primary mechanisms: mutation and natural selection. Mutation causes small variations in an organisms DNA, which can be helpful or hurtful to the organism. Natural selection is the process by which helpful mutations spread through the population because they help the organism survive, and detrimental mutations are removed from the population because they often die before reproducing. Hope this helps!

a and c are the answeres

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