Concept:A collective noun is a word used to name a group of people, animals, or things. The correct collective noun for a group of fish is “shoal.”
Explanation:Different collective nouns are used for different animals.
“Pack” is used for wolves or dogs.
“Colony” is used for ants, termites, or bats.
“Swarm” is used for bees or locusts.
When many fish swim together, especially of the same kind, the correct term is “shoal.”
Therefore, the sentence means the fisherman saw a large group of fish swimming together in the river.
This makes option C the most suitable choice.
Answer:C. shoal