Wave behavior refers to how waves interact with their environment. Waves can reflect, refract, and diffract. Reflection occurs when a wave bounces off a surface, while refraction is the bending of waves as they pass from one medium to another, like light moving from air into water. Diffraction happens when waves spread out after passing through a narrow opening or around obstacles. Different types of waves exhibit unique behaviors. For example, sound waves can travel through air and water, while light waves can travel through a vacuum. Understanding wave behavior is essential in fields like acoustics, optics, and seismology.