A). What is energy and its forms?

Energy is the capacity of the body to do a work.

There are 7 main types of energy:

The Seven Forms of Energy: Mechanical, Heat, Chemical, Electrical Radiant, Nuclear, and Sound.

positive reinforcement? ?

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer