Does a piece of music need to have the same time signature from beginning to end?

No

Explanation:

It is very common for music to change key signatures and time signatures too throughout the piece.

no

almost no music starts and end in the same music piece. It could happen but it is not very common

answer/// priests singing psalms and the congregation singing responses;

the answer is work ethic something you dont have

and ban me aain euro u nerd