Which military conflict is most directly related to this passage? a) american civil war b) american revolution c) spanish american war d) mexican american war

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

i think that the right answer is the aztecs

ecologists usually specialise in a particular area, such as freshwater, marine, terrestrial, fauna or flora and carry out a range of tasks relating to that area. when starting out, ecologists often conduct surveys to identify, record, and monitor species and their habitats.