Explanation:
because it allows you to eliminate or isolate variable/ it allows the experiment to minimize the changes in all the variables except the one being test.
I'm not gonna choose bc I'm not 100% sure either so read what's above, think it over and choose wisely
hope I helped a little and good luck :)
The answer is Bioenergetics. Hope this helps.
<span>3* 1 = 3 answer a
I think so
</span>
A. To understand the nature of an experimental subject