identifying wave interactions through observations what type of interaction allows the sidewalk to heat up…

Brief Explanations:

Absorption is the process where energy from waves (such as sunlight) is taken in by a material (the sidewalk), increasing its temperature and allowing it to cook the egg. Diffraction is the bending of waves around obstacles, reflection is the bouncing - back of waves, and transmission is the passing of waves through a medium.

Answer:

absorption