Answer:
Most nouns form their plurals by adding s.
Step-by-step explanation:
The most common ending in regular nouns that become plural is "s", even when we have other endings such as "ies", "es" and "ves", they follow specific rules that don't apply to many of the nouns, they just apply to specific spelling cases, then the biggest percentage of words will use "s", for example, book - books.