Multiple choice

How does pollution travel from a river to the ocean?

  1. Pollution flows upstream toward the ocean.

  2. Pollution flows downstream toward the ocean.

  3. Pollution flows toward the bank of a river and then to the ocean.

  4. Pollution flows toward the source of a river.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rivers naturally flow downstream due to gravity, moving from their source toward larger bodies of water like oceans. Any pollution introduced into a river will be carried along with this downstream current into the ocean.

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