I think that the underlined pronoun is "them", correct?
"them" is not a possessive (this would be "their") nor is it nominative (this would be "they").
So it must be objective; and it is in fact the direct object!
My personal recommendations would be to
A ) Make the subject shorter, like "Reason for Absence" or "My Absence"
B ) Make the email more formal. (You don't have to copy my recommendation word for word but if you want to or use it for reference that works):
"Good Morning/Afternoon/Evening Mrs. __,
I hole you're have a lovely morning/afternoon/evening. Today I was absent and I apologize for the inconvenience. The class meeting didn't appear on my canvas courses and I couldn't find a zoom link. If there's anywhere I can find either one for the future please let me know and again I'm sorry for the inconvenience.
Sincerely,
__"
Atticus explained in a way that the children will understand it. He thinks that the children convinced Mr. Cunningham that Atticus is an innoccent person who stands up to the Tom Robinson case. I think Atticus is wrong because the children are like defending him from the danger he's about to get in. His understand of a mob is realistic.
I read this book recently and I know it's correct. Hope this helps!
Both girls were ecstatic to hear they won the competition.