It is also called “dynamic” in speech choir.

The ability to combine successfully the light, medium, and dark voices in the choir. 

It refers to the rate of speed at which a reading progress. 

These selections are typically poems or poetic passage such as from Greek dramas or Shakespeare's plays.

The ability to successfully organized and position the choir on stage or risers for performance effect.

It refers to the variations of the voice on the musical scale is generally referred to as infection.

It is the ability to use volume, force or loudness as emphasis in appropriate places to better express feeling and meaning. 

It refers to strongly in rehearsal and in your everyday life.

A speech choir is typically the same size as a singing choir having more participants.

Your words will be clear and vibrant and it is a learned skill of speaking.

It is your guide, it's what the audience came to see and hear you perform.