Which of the following waves do not travel the same way or at the same speed through space as the other three? O A. the sound of a firecracker
OB. an X-ray in the hospital
O c. the red light at a stop signal
OD. the infrared signal from your TV remote control

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.