If you don't know how that kind of thing works, you are likely to make mistakes regarding it. If you know how it works, you can prevent yourself from making mistakes that could endanger yourself and/or others.
Answer:
Hi! Your answer here is C. Being active and improving health leads to better sleep. Exercise tires you out, and the more active you are, the more your body pushes you to sleep at night.
B. Spinal nerves I think, it makes most sense to me.
The answer B bruh don't ever be slumped you'll have a bad back before you're 20
In this system, the sex of an individual<span> is determined by a </span>pair<span> of </span>sex chromosomes called the <span>gonosomes. Females typically have two of the same kind of </span>sex chromosome <span>(XX) and are called the homogametic </span>sex<span>. Males typically have two distinct </span>sex chromosomes<span> (XY), and are called the heterogametic </span>sex<span>.</span>