Hello! Polar climate is in North & South Poles, where the weather there is extremely cold. Just by looking at the answer choices alone, A and B are both eliminated, because it is not hot, warm, or humid. Plus, the weather described in those answer choices does not fit at all. D is out as well, because the weather does not vary in the poles. It is very cold year-round. The only answer choice that even makes sense in this problem is C. Therefore, the answer is C.
I am pretty sure the answer is population.
The Guayas River flows through Guyaquil, which is the largest city in
Ecuador. However, it is not the capital city, which is Quito. The Guayas
River has it's name, because it flows through the Guayas province. The
Guayas River does not flow into any ocean or sea. Guayaquil is also the
most populated in Ecuador. The city underwent relatively recently an
"urban renegation" to attract more tourists to that particular region of
Ecuador. This was also to help boost the economy, since at the moment
it mostly consists of small and medium businesses, agriculture and
aquaculture.
B since there is a high chance of birth and a low chance of death
