Question

What is Lagoon?
Rift Valley​

Answer 1

Answer:

lagoon is a lake of salt water that is separated from the sea by sand or rock

Explanation:

thank u

Answer 2

Hey mate here is your answer

Lagoon - A shallow areaof salt or brackish coastal water completely or partly separated from the open sea by some more or less effective obstacles.

A rift valley- A valley formed as a result of the subsidence

(sinking) of the land mass between two blocks due to faulting.

Hope it's help you.....