Answer:
the colour change
Explanation:
because experimental group refers to the things that are exposed to or get affected by the independent variable
D is the answer to this question.
Have you ever watched a caterpillar turn into a butterfly? If so, you're probably familiar with the idea of alife cycle<span>. Butterflies go through some fairly spectacular </span>life cycle<span> transitions—turning from something that looks like a lowly worm into a glorious creature that floats on the breeze. Other organisms, from humans to plants.</span>
Carbohydrates are the sugars, starches and fibers found in fruits, grains, vegetables and milk products.
Hope it helps
I am thinking D. But I am not sure that it is the answer.