Hey there!
I believe the answer is self-concept
Either shoes or skinny jeans, I'd go with shoes. Xavier would grow in both height and weight as he goes through the growth spurt. As his height grows, his foot will grow accordingly as he needs support for his enlarging body. So he would need shoes prior to all others.
Just reread the text I'm sure you can find it in there. You are probably over thinking it. I know this isn't the awnsr you wanted bit you should do a bother activity to clear your mind and try again later☺
The easiest way to do this is to set them up as equivalent fractions, and to solve for x.

x=6
Good relations with other countries in order to control the natural resources apart from rival imperialist <span>policy</span>