How did Dr. William Gorgas help to reduce the spread of disease in Panama?

Hye-seung is giving a speech on turtles, specifically on the need to protect the turtle population in the pacific ocean due to rising ocean temperatures. the general purpose of her speech is likely:

Which member of the president's cabinet is most likely to negotiate a treaty with a foreign country? secretary of the interior secretary of the treasury secretary of defense secretary of state

Acase study allows a more detailed look at the life of a single subject than any other study