Some nouns that end in -um are made plural by changing the –um to –a. which of the following best explains this change? a. they have greek origins and therefore have irregular plural forms. b. they have latin origins and therefore have irregular plural forms. c. they have spanish origins and therefore have irregular plural forms. d. there are no words that change forms like that in english

B. They have Latin origins and therefore have irregular plural forms.

Explanation:

Nouns that end in -um are loan words from Latin. These nouns were neuter in gender and formed the plural form in their language by changing the ending -um to -a. That's what we still see in some English words borrowed from Latin.

datum - data

bacterium - bacteria

stadium - can be both stadiums and stadia

explanation:

they get it from nuts,peanut butter,seeds etc

answer: how the techniques the author's use accomplish their purposes