Question

B. Correct the incorrect use of collective nouns and rewrite the following sentences. 
1. A colony of mountains surrounded the valley.
2. My mother feeds seeds to a troop of sparrows every day.​

Answer 1

Answer:

1. A range of mountains surrounded the valley.

2. My mother feeds seeds to a flock of sparrows every day .

Answer 2

A noun denoting a group of people or things collectively is called collective noun.

For example, a herd of sheep: herd represents the collective noun.  

Rewriting the sentences by correcting incorrect use of nouns,

1.  A range of mountains surrounded the valley.

The collective noun 'colony' mentioned in the question is wrong.  

2. My mother feeds seeds to a flock of sparrows every day.

The collective noun 'troop' mentioned in the question is wrong.