The most important subject for (their,<u> them</u>) was how to plant
<h2>Noun and Pronoun :</h2>
By definition, a noun is just defined as a name of a person, animal, place or things. Example of nouns included Peter, Paul, Sophia, Cat, Table, New York, Texas, e.t.c
Now,a Pronoun may be a subcategory of nouns and it is simply a word that can replace a noun to avoid repetition. for instance , rather than calling someone by his name like Peter, you'll say;
Peter wants to return but "he" said he is tired. So we see that the word he has replaced Peter to avoid repetition.
Learn more about noun and pronoun :
brainly.com/question/17392892
#SPJ4