Answer would be conflict. Antagonist is essentially the protagonist's enemy.
Answer: Once a year, the college goes on (AN) expedition trip to do charity work abroad. Last year’s trip was to help set up (A) community garden in South America. This year’s trip will be to Kenya. The trips are expensive, but students can save (A) lot of money by working together and doing fundraising events.
Explanation:
“An” is used when the following word begins with a vowel, “a” is used when the following word begins with a consonant. The second sentence would use “a” instead of “the”. I don’t know how to explain how I know, but my answer is correct.
Even though the story revolves around the premise of the aunts' mercy killings, the central conflict is with Jonathan. Without Jonathan's arrival as the primary antagonist, there would be few to no real obstacles between Mortimer and his goal of protecting his aunts and committing Teddy.