Darwin made numerous observations and collected evidence that led him to purpose a revolutionary hypothesis about the way life changes over time. I hope this helped :)
The answer is
c. he should write down data clear, step-by-step instructions as he goes along
Answer:
Answer is hypodermis .
Explanation:
The hypodermis which is also known as the subcutaneous tissue layer, is found lying beneath the dermis and act as a passageway or channel through which blood vessels and nerves passed. It is made up of fat and connective tissues.
It acts as an insulator, this, help in keeping the body temperature stable.
