Amir and Gracie left some evidence of breakfast behind. Luckily, some of it can be changed back. What does Mosa write down as clues that a substance will easily change back?

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.