Read the text about The Soldier’s Life: Radio Basics.

The Soldier’s Life: Radio Basics

Radios are vital military tools. They allow soldiers to stay in contact during combat and other operations. Most radios are made to hop frequencies. This system prevents enemy from listening to the full conversations. The SINCGARS (man-pack) and AN/PRC-148 (handheld) are common military radios.

Choose the right option to answer the question: What’s the meaning of “stay in contact” in the text?