Which excerpt from the girl who silenced the world for five minutes expresses and opinion?

Starving children around the world

Countless animals dying across this planet

Holes in the ozone

I wonder if they will even exist for my children

The excerpt from "The Girl Who Silenced the World for Five Minutes" which expresses an opinion is - I wonder if they will even exist for my children. Assuming the other options are starving children around the world, countless animals dying across this planet, and holes in the ozone, then the only correct answer is the one above. The remaining options are facts, whereas the correct option is her personal opinion about the subject she is talking about.