If immigrants had measles, doctors would treat them at a hospital on the island.
Explanation:
The detail that best fits under the circle that reads "Treating curable diseases." is that if immigrants had measles, doctors would treat them at a hospital on the island.
It falls under the fallacy of half truths. It is a selective thinking whose main objective is to focus on pieces of evidence that hold to be true to the believers and omits some facts to present an accurate argument.