Question

4. If

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Answer 1

Answer:

Pollution is difficult to control because it is often the result of human infrastructure around a river. ... Sewage and effluent are discharged into rivers in some areas. Pollution can lower the pH of the water, affecting all organisms from algae to vertebrates. Biodiversity decreases with decreasing pH.M

Answer 2

Answer:

. The safest - allows websites to use only their basic functions. Scripts on all pages, even those with HTTPS protocol do not start. Many pages will be non-functional in this mode