Question

what do physicists study?
a. how matter and energy interact
b. the properties of matter
c. economics
d. living things

Explanation:

Physics is a natural science. Physicists study the fundamental nature of matter and energy and their interactions. Option C (Economics) is in the Business discipline. Option D (Living things) is studied in Biology (Natural Science - Biology). Option B (Properties of matter) is too narrow compared to the comprehensive study of matter - energy interactions in physics.

Answer:

A. How matter and energy interact