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.

The reason why cities tended to develop in the region of the fall line of rivers is because of the need to offload goods from the ships since navigation will be hindered at the zone.

Explanation:

Fall line is a region that separates the upland or mountainous zone from the lowland river bodies, where waterfall also occurs. The waterfall in this region tends to expose the beneath bedrock materials and stop the movement of riverboats and ships upstream. Therefore, the boats must offload their goods, which tends to induce the formation of ports and majorly settlement by commercially oriented people who are willing to utilize the opportunity to trade on the commodities offloaded. The emergence of cities along the river fall lines is owing to this reason.

the answer is cell division : )

idk what the options are but

these is a strong electrostatic attraction between the ions hence a lot of energy is needed to overcome this attraction

this is why the boiling points are so high