They are called B.) Organs .
My reason being is because organs are your kidneys , lungs, and etc.
Cells are not tissue but they are what runs through your blood.
and Systems build up all of those , Organs are a group of things that work together to function a specific part .this is what works together to perform the same functions.
I really hope this helps you a lot :)
The answer is pronation. This happens at proximal radioulnar
joint in which movement is allowed. It is the movement seen most of the times
in the individual’s foot. It is where the heels move outward in position and
the foot is rolled.
D. Membrane. Can also be called cell membrane so you don't get confused with the nucleus's membrane/envelope!
Answer:
I'm not 100% sure but I'm positive the answer was or is Methane, correct me if I'm wrong!