Which of these refers to a tempo

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.

Artworks made to be used in a ritual context often have what kind of meanings in addition to their appearance and visual impact?

What is one popular pop artist or group (from today or from the past)? why does this person/group's music fit into the pop genre? why do you think the person/group was successful with their music?