Answer:
A
Explanation:
Homeostasis
Can I have a photo ///
The volume of a cylinder is expressed as:
Volume = πr²h
where r is the radius of the base and h is the height of the cylinder. If the r is doubled then,
Volume = π(2r)²h
Volume = 4πr²h
The volume is four times as much the original volume.
12. Stomach
14. Nerves
16. Stomach
18. The heart
20. Muscle
22. Lungs
That's my best guess.