Shouldnt this say "las niñas visitan a sus abuela" since niñas is plural?
Su needs to stay singular, since there is only one abuela.
Su for one person, always. It can be his or her or their.
I don't understand why it's not "sus abuela" since there's more than one niña. I said "your grandmother" and duo let me get away with that.
Su needs to agree with abuela, not the girls.
Su can be his, her, their, or your.
Sorry for the confusion, I am asking if the the sentence was abeulos, would you use "sus" ?
Since I had the same question about "su" that others did, and I believe I understand your answer, I wanted to make sure I was understanding when you would use "sus"