Calories indicate and measure the energy available in food. Protein each contain 4 calories per gram.
The digestive enzyme that hydrolyzes lipids, acts as catalyst for the hydrolysis of lipid, aids emulsification of fat, and keeps tiny fat droplets suspended in the aqueous content of the gut is LIPASE. This enzyme is a subclass of esterases that breakdown fats to fatty acids and glycerol and other alcohols.
Sponges are similar to a small intestine because they'll both squeeze parts of themselves to digest foods and nutrients. Not to mention the fact that they're both soft.
Hope this helped! <3
I think it might be C if not then B but I would go with C
Sorry if I got it wrong