Final answer:
The given nouns in their plural forms are actors, cows, radios, rallies, and territories. For words that end with a consonant followed by 'y', the 'y' changes to 'ies' in the plural.
Step-by-step explanation:
The plural forms of the given words are as follows:
- Actor – Actors
- Cow – Cows
- Radio – Radios
- Rally – Rallies (note that we change 'y' to 'ies')
- Territory – Territories (similarly, we change 'y' to 'ies')
In English, the typical rule to form the plural of a noun is to add an 's' to the end of the word. However, if the word ends with a consonant followed by a 'y', the 'y' is changed to 'ies' for the plural form.