Question

[GT.03]The theory of adaptation is valid because scientists

agree with it.
regard it as modern.
could not test its facts.
could not understand other theories.

Answer 1

I’m pretty sure it’s: Regard it as modern

Answer 2

I agree with it.

Step-by-step explanation:

The "theory of adaptation" is the theory based on the individual ability to adapt to the changes of environment around his/her, this theory also knows as the Darwin theory of survival of the fittest in which an organism has to adapt the changes around him for the survival.

The adaptation usually occurs after the period of evolution where the generation of the species learns to eat, breed and raise their young ones in the environment which is fittest to them and in which they can survive.