Answer:
I would first put jaws at number one because most of the other options are for mammals while some marine life has jaws too.
The integumentary system has a variety of functions; it may serve to waterproof, cushion, and protect the deeper tissues, excrete wastes, and regulate temperature, and is the attachment site for sensory receptors to detect pain, sensation, pressure, and temperature.
Explanation:
1. they are convenient to use 2. it helps the international tade 3. it eases the exchange of material
A not true
B not true
C could be true
D not true
