Point source pollution is contamination that does not come from a single point source. Instead, it happens when there is a buildup of small amounts of contaminants that collect from a large area.

Explanation:

Point source pollution results from the contaminants that enter a waterway or water body through a single site. Examples of this include untreated sewage, wastewater from a sewage treatment plant, and leaking underground tanks.

(1). Digoxin

Explanation:

Digoxin is a drug that is administer to patients so as to

help in the improvement in the pumping efficacy of the heart.

The overdose of the drug Digoxin causes toxicity leading to nausea, vomiting, bradycardia, anorexia, and dysrhythmias.

For the drug Nesiritide, its side effects include effects like headache, insomnia, and hypotension.

For the drug dobutamine, dobutamine does not cause nausea or vomiting but may cause hypertension and hypotension.

And finally, the drug Sprironolactone, Spironolactone may cause edema.