What is the motion of the particles in this kind of wave?

a. the particles will move up and down over large areas.
b. the particles will move up and down over small areas.
c. the particles will move side to side over small areas.
d. the particles will move side to side over large areas.

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !