Answer:
it depends which part of the us you are talking about - and by ecosystems do you mean biomes
Explanation:
the us have these following ecosystem
-taiga , hot deserts, cold deserts, tropical dry forests, temperate deciduous forests etc
Chanel I think I'm sorry if it's wrong it might be mouth
Fishing is the leading industry in Greenland.
You would find it in the disk.
<span>Factories and their corresponding jobs were located in cities and created economic opportunities for migrants.</span>