What is the only evolutionary mechanism that consistently leads to adaptive evolution?

natural selection

Explanation:

Natural selection refers to the never ending battle for survival that happen to all organisms with their own varied genetic structure.

When  certain type of organisms live in one specific environment for a long period of time, there is a huge chance that the organisms who have the most adaptable characteristics will survive and produce more children. Over time, the number of organisms that have that adaptable characteristic will keep increasing and dominate the environment.

when your a dog and you need a bone.   go and eat a rabbit

hello,

your answer is ready

i believe its either the first or third option but i'm leaning more towards the third option:

the first excerpt makes a logical appeal, while the second excerpt makes an emotional appeal.

your pal

~papaguy