I belive that the emperor penguin fits all the criteria of Group B.
The correct answer is D. RAMP because you use a ramp to reduce the amount of force needed to that work force. Hope This Helps!
D a change in color of a subtance
Answer: d. Great Saphenous Vein
Explanation:
The great saphenous vein is the major vein of the medial leg and thigh. It extends from the top of the foot to the upper thigh and groin.
(pls mark me the brainliest)