Answer:
Many things, such as weather change, migration cycles being thrown off, droughts, floods, and more
I think the correct answer from the choices listed above is option A. The Rift Valley in Africa is an example of the African plate is breaking apart to form two separate plates.A rift valley is a linear-shaped lowland between several highlands or mountain ranges created by the action of a geologic rift or fault.
When a subsidiary channel joins up with a main river along with other channels, these channels are known as <u>Tributaries</u>.
<h3>What are tributaries?</h3>
These are channels that join up with a river and feed the river water to keep it flowing.
These tributries can come from several sources such as lakes, other rivers, and even rainfall but their purpose is to feed the main river that they are connected to.
Find out more on tributaries at brainly.com/question/65521.