Can someone please help me .. will mark brainliest !

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.

Unlike other andean nations, chile has a relatively small population of mestizos people of european descent indians people of asian descent