Four; the upper atmosphere, the atmosphere, the mantle, and the core.
Answer:
The cuticle is the hair's protective layer, the cortex forms the pigment of the hair, the health of the cortex depends on the cuticle protecting it while the medulla is the innermost of the hair.
Explanation:
The cuticle is the hair outermost layer, the cortex is the middle structure for strength while medulla is the inner most.
Whattttttt? I can’t see anything
It's a mutualism relationship because both species can benefit from each other.
