As a person ages, his or her levels of cardiorespiratory fitness tend to
a. improve
b. decline
c. stay the same
d. none of the above select the best answer from the choices provided.

Decline. With aging, heart does not reamin the very efficient pacemaker. The arteries gets deposited with fats, fibrous tissue develops in them, which leads in slowing down of heart. Further, size of heart increases, which leads to more time in filling up of heart. The muscle cells of the heart also deteriorate. Thus, cardiorespiratory fitness deteriorates.

Yeah, the answer is definitely b.assuming that you're a high school student or middle school student, you probably don't need your parents' to pick out your clothes anymore. and i don't know how it works at other schools, but i know that at my high school, you don't get to pick the book you read for an english assignment. your teacher picks that. the decision of what after-school job i should get, i would definitely make with from my parents and other people that i trust. ultimately, the decision is up to me, but i would need advice from people who are more experienced.