Is it natural for us to be envious of others success?

That one is simple. Because we want success for ourselves. When someone is more successful, happier, richer, smarter, prettier, better in any way or has a better life, we wish that it was happening to us instead of that person. That reaction is quite natural. However, we should never demean or diminish the other person because of our envy towards them.

Yes, it is normal to feel envy of other people's success, but we should never let that envy drive us to do things we might regret or that may hurt the person down the line.

Hope this helps!

since it is asking for her reaction to elnora's trouble at school you can rule out any answers with a positive response (b). then you can rule out (d), this is because it does not show the mother's reaction but the daughter's response. that leaves you with two options (a) and (c), by looking at the options you can rule out (c) because it isn't referring back to elnora's issues at school.

the words "strangest" and "unusual" suggest (: