Question

a small area of still water in a hollow place called​

Answer 1

A small area of still water in a hollow place are called Slopes and Pools

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Answer 2

Answer:

A small area of still water in a hollow place is called a pool.

Explanation:

A pool is a very shallow and hollow enclosure which holds water in it. Since it is a small place with a defined shape the water cannot flow out from it and is usually still in it. Pools are generally small areas.

People can bathe, wash clothes and do a lot of activities in a pool. A pool is a noun and is a content word. A sentence with the word pool in it is: He went to have a swim in the pool.