안녕하세요!

이 문제도 우리에게 주어진 best answer를 고른다는 마음으로 봐야하는게

key points in the question is about "stable age distribution"

so we are looking at whatever directly points to population graphs that show

relatively equal proportions of each age group that will remain unchanged in the future.

the emphasis here lies on the word "stable distribution".

그래프가 기둥 형태로, 모든 나이대가 앞으로 쭉 비슷한 숫자가 유지될거라 생각되는걸 찾는거죠.

a) states a growing population so we can imagine more children compared to adults,

which is not equal distribution 

b) states a negative growth rate, which will have more adults compared to children

again not an equal distribution.

c) early logistical growth is rapid increase in population so more children

e) cusp of becoming exponential growth doesn't actually tell us about

the proportion of each age group of that population.

d) specifically states that proportion of age groups remain constant.

longer life spans of individuals (due to better health care or less war) will result in an increase

in the total population number,

but nonetheless, each age group will remain stable and not dramatically changed.

도움이 됐나요?

열공하시고 혹시 또 질문이 생기면 게시판에서 만나요! :D