Question

the bending or change in direction of a wave as it moves through materials with different properties
refraction
reflection
resonance
diffraction

Explanation:

Refraction is defined as the bending or change in direction of a wave as it passes through materials with different properties. Reflection is the bouncing - back of a wave, resonance is the increase in amplitude when a system is driven at its natural frequency, and diffraction is the bending of a wave around obstacles or through openings.

Answer:

A. Refraction