Which of the following Cold War practices had a direct impact on the daily lives of many American citizens including children?

Blacklisting

Duck and cover drills

Gaining allies

Stockpiling weapons

Duck and cover drills

Option B. The Cold War practice that had a direct impact on the daily lives of many American citizens including children was called Duck and cover drills.

Explanation:

After the Soviet Union exploded its first atomic bomb, the American public became notoriously more nervous. By the early 1950, a new federal agency called Federal Civil Defense Administration (FCDA) started to educate the public on safe procedures to take in case of an atomic attack. Schools across the country were training students to dive under their desks and cover their heads. This movement became known as the "duck and cover drills" and, naturally, channeled a growing panic over the population, that was now affected in their every day lives due to the Cold War.