Help me with this please

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.

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine