Into your bladder sack, then you pee and it then goes into the pipes
Answer: 2
Explanation:- Mechanical advantage is the ratio of the output force to the input force.
Mechanical advantage=
Given:
Input force = 320 N
output force= 640 N

The answer should most likely be the last one if not than the first one.
I think it’s b not sure though
I would say nucleus.
Hope this helps !
Photon