Skin<span> is an elastic covering. It </span>protects<span> you against exposure to dangerous things in the environment such as bacteria. Since they form an elastic cover, they are able to B)Extend and contract for movement.</span>
I think it’s D because there is no need to take them if you are not pregnant
I would say 90% of your maximum ability, because I am athletic.
But in most scenarios, it should be c) 60%
hope this helps!! :D