What is the difference between the highest and lowest notes in a melody called?

The rythmetic note that has three beats is called

To make an etching the artist first coats the entire printing plate with an acid-resistant substance called a made from beeswax, asphalt, and other material. the artist then draws on the coated plate with an etching needle exposing the metal. next the plate is dipped in the plate is removed, the waxy coating removed, and the plate is cleaned, inked and printed.

Go for the face to the foot 30 inche to40units