All music in dance is considered metered. true or false

Ineed some on finding music. i have a nephew who is into rap, but when i find a rap song, it seems to either be too old for his taste or to him it isn't good enough. can someone suggest some good music for me to see if he likes it or not?

What do the movies superbad, apocalypto, and dogville have in common 1. all shot on film 2. all shot on digital or hd

Need some ! asap i need to figure out 3 major changes in bridges over time and why these changes to adapt to both improvements in technology and changing social links would also alot.