Question

\for many years, steam engines were used primarily for operating ____________.\
drills
pumps
trains
rewatch

Explanation:

Historically, steam engines were initially and primarily used to operate pumps (e.g., in mining to remove water) before broader use in trains and other applications. Drills were less associated with early steam engine primary use, and trains came later in the development of steam engine applications.

Answer:

B. pumps