the action or process of settling among and establishing control over the indigenous people of an area.
Human activities such as mining, pollution, minerals processing, landfills, etc have an effect on the flow pattern.
<h3>
Effect of pollution</h3>
It should be noted that pollution is usually difficult to control because it is often the result of human infrastructure around a river.
For example, sewage and effluent are discharged into rivers in some areas and this can lower the pH of the water, and hence affect the organisms.
Also, human activities such as mining, pollution, minerals processing, landfills, impact negatively on the quality of water and the flow pattern in the upper reaches of the blood river in Limpopo.
Learn more about pollution on:
brainly.com/question/24704410
The answer to your question is,
Two. The twin towers both collapsed.
-Mabel <3
