Select the reason cities tended to develop at the fall line on rivers.
a)the fall line is where rivers converge, which was beneficial for trade.
b)the fall line is the widest point along the middle of a river, so travel was easier.
c)the fall line is where rivers are no longer navigable by ships traveling in from the ocean, so goods had to be offloaded.
d) the fall line follows the ridge of the appalachian mountains, providing access inland where goods could be traded.

no i don't feel that humans have oversubscribed some medications

the glands which are associated with each description is given below:

glacial erosion, the picking up and movement of earth beneath a glacier, is also referred to as plucking. erosion and transportation of individual pieces of bedrock, especially large "joint block occur as a result of this glacial erosion. plucking is type of erosion in which rocks become frozen into the bottom and sides of the glacier.as the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.