D. a globe :) sorry if this didn't help!!
Hello there!
The only one i can see caused primarily by human activities would be A. Air Pollution.
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Oral rehydration therapy (ORT) is a type of fluid replacement used to prevent and treat dehydration, especially that due to diarrhea. It involves drinking water with modest amounts of sugar and salts, specifically sodium<span> and </span>potassium<span>. Oral rehydration therapy can also be given by a nasogastric tube. Hope This Helps! :)</span>
I believe the awncer is B