How is the Amazon River a barrier? Check all that apply.

A. It runs 6,400 kilometers, splitting the continent.

B. Tributaries are long and fanned out, splitting up the land.

c. It's hard to reach through the rain forest.

D. The water is often polluted with mercury.

What exactly do you mean 

Humid continental climate is found in the interior of continents between the 30 and 60 degrees latitude, but usually above the 40 degree line.   40 degrees north of the equator means less direct sunlight and therefore less warmth.   this climate is mainly found in the northern hemisphere since there are no major landmasses in the southern hemisphere.  if you live in northern indiana, you know all about humid continental because that is the climate type you have!

The correct answer is:   [b]:   "physical systems" .