I think it is A because it makes the most sense. and number 7 is A
I think this answers both of your questions. <span>Many apartments didn't have windows, heat, or indoor plumbing. Streets were littered with garbage. Half of all babies at the time died before the age of one.</span>
In Latin America, the climates there are hot, and humid. There are also many areas where it is hot and dry.
Some ecosystems:
-Rainforests
-Grasslands
-Desert Scrub
I hope this helps you!