Answer :
Explanation:
The periscope is used in the submarines to see what is going on the water surface.
It is also used in some gun turrets and it is used in armed vehicles.
✨Hope it helps.✨

A periscope is an object/tool used to see things that are not in direct line of sight, and to be able to see while staying behind cover. For example, in a tank, a submarine, or behind armor.