Question

developments in medical technology make it possible to
use less energy to power hospitals.
monitor and control population growth.
prevent pests from destroying food crops.
detect and treat a wide variety of illnesses.

Explanation:

Medical technology focuses on healthcare. Using less energy (related to engineering or energy fields), monitoring population growth (demographics/social science), and preventing pests (agriculture) are not core medical technology functions. Detecting and treating illnesses is central to medical technology.

Answer:

detect and treat a wide variety of illnesses.