Which of the following statements about the rivers of the united states and canada is false?
a.
the grand canyon was formed by the continuous flow of the columbia river.
b.
the yukon river flows from british columbia, through alaska, and into the bering sea.
c.
the colorado river runs through the grand canyon.
d.
the continental divide acts as a boundary that determines to which ocean rivers flow.

The false statement is - A. The Grand Canyon was formed by the continuous flow of the Columbia River.

The Columbia River and the Grand Canyon do not have any touching point, yet alone that the Grand Canyon has been formed by the flow of this river. Columbia River is a big river, and it flows through the northwestern part of the country. It is very important for the people that live in this part of the Untied States because the river flows into the Pacific Ocean, and it is big enough so that boats can move through it and go further in the mainland, so economically it is a very important feature in the region.

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.