Which of the following routes of administration delivers medication through the gastrointestinal/digestive tract?

The correct answer is enteral because this route of administration specifically involves delivering medication through the gastrointestinal tract. Medications administered enterally can include those taken orally, such as tablets, capsules, or liquids, and also involve other forms like rectal administration. The enteral route relies on the digestive system to absorb the medication into the bloodstream, making it effective for many types of medications.

In contrast, intravenous administration delivers medication directly into the bloodstream through a vein, bypassing the gastrointestinal tract entirely. Topical administration involves applying medication directly onto the skin or mucous membranes, also outside the gastrointestinal tract. Parenteral administration includes any method of delivering medication that does not involve the gastrointestinal tract, typically referring to injections or infusions. Thus, enteral is the only option that works through the digestive system specifically.