Moving from the equator towards the poles allows you to cross through different ecosystems, which can also occur if? A. You stay in one place through all 4 seasons
B. You use submarine
C. You cross from the western to eastern hemisphere
D. You climb a mountain

C. You cross from the western to eastern hemisphere

Explanation:

I believe this is the most reasonable answer but the question is a little confusing. If it is asking how to travel through different ecosystems then C is the most reasonable as A would only change the temperature and sometimes change the weather. B would keep you underwater all the time and you can't really switch ecosystems unless you got out. D, your staying in one ecosystem when climbing a mountain.

Hope this helps :)

climate change and pollution