When a sound from a source is refracted away from the surface of the earth, it gives an indication that the
a. air is cooler than the ground.
b. ground is cooling faster than the air.
c. air has high humidity.
d. wind is blowing in the direction of the sound.

temperatures get warmer — and heatwaves are more common. nothing says summer like warm weather. this rise in temperatures is caused by the tilt of the earth's axis. our planet doesn't sit perfectly straight as it spins — it has a slight lean of approximately 23.5 degrees with respect to the sun, called the axial tilt.

explanation: