Finger- like projections facilitate absorption in the following ways;
a) They increase the surface area of the organ eg. small intestines to allow more area of nutrients to be absorbed. The larger the surface area the more nutrients are absorbed.
b) They contain many capillaries which helps to increase the rate of nutrients absorption in the small intestines.
I would choose the second option because animal are not objects that don’t feel anything they kinda like human(they have feelings).
The Muscles, the shrimp stores energy in it's muscles.
Gametogenesis produces human egg and sperm cells