40. Which of the following differences between two populations could NOT be discerned by comparing their population pyramids?

Witch one is it soo it the the question b.a,b,c,d

Which countries were controlled by france at the beginning of world war i? hint: use the map in the lesson to you answer this question. algeria burma cambodia indonesia vietnam

Hey, i was what is consisted in a sustainable city? like what unique designs they have, etc. for answering ; )