Answer:
Explanation:
Myelin is a lipid-rich (fatty) substance that surrounds nerve cell axons (the nervous system's "wires") to insulate them and increase the rate at which electrical impulses (called action potentials) are passed along the axon.
C, exercise is the correct answer
I think that it's A, maybe C
Answer: D. sunbathing
explanation: not sure it’s just not a sport lol
