Final answer:
Irregular plurals involve changing the f to a v, changing vowel sounds and spelling, and using different endings. Collective nouns name groups of people, places, or things.
Step-by-step explanation:
The correct plural forms of the given sentences are:
- The pack of wolves included males, females, and cubs.
- My feet and calves are sore from walking on the trails yesterday.
- The women entered the room even though they were afraid of the mice.
- How many chefs are needed for the feast this weekend?
- The trout are passing through these rivers at this time of year.
Learn more about Irregular plurals and collective nouns