Question

part b: using keywords

1. the question says: according to the passage, what is the main cause of pollution in the river?

a. the river was very old
b. people swam in it daily
c. factories dumped waste into it
d. fish were dying

Explanation:

To determine the main cause of river pollution, we analyze each option:

• Option A: A river's age is not a typical cause of pollution. Rivers can be old without being polluted.
• Option B: People swimming in a river daily is not a main cause of pollution. Swimming itself doesn't introduce significant pollutants.
• Option C: Factories dumping waste into a river is a common and major source of pollution, as industrial waste contains harmful chemicals and materials.
• Option D: Fish dying is a result of pollution, not a cause.

Answer:

C. Factories dumped waste into it