Question

A ______ or cave is a natural underground space large enough for a human to enter. These openings form naturally by the weathering of rock and can extend deep underground.

A) Cavern
B) valley
C) canyon
D) sink hole​

Answer 1

A) Cavern

Step-by-step explanation:

A cavern is essentially the same thing as a cave, but are typically large and deep and formed by the weathering of the rocks around it.

Answer 2

Cavern is the answer

option A