Answer:
bridge,for,and eye or enclosure
Fats have a lot of benefits , starting with improving taste , supplying nutrients , providing energy and protection by surrounding the organs.
Do not worry so much about the why of classification. Classification is important because it is a lens through which to see what is there. It is not intrinsically true in and of itself. Distinctions are important only as vehicles for a common base of communication. All things have symmetry. A reflection has symmetry. Symmetry means organized life. Organized life is what happens when RNA replicates. It is the difference between chaos and order