<span>Preservation of advantageous genetic mutations, I think.</span>
Because you cannot test it or observe it.
A scientific theory are created through the scientific method, in the scientific method you need to be able observe it and experiment.
Guessing you mean "impulse".
It means to have a sudden strong desire to do something or a small amount of energy that moves from one area to another.
Hope this helps.
Answer:
i believe that the awnser is A
Explanation:
