Something that flows easily, like water

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.

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

What are similarities and differences of reflection, refraction, diffraction and absorption?