Question

dense matter, bones or lead, absorb these waves so they dont pass through
ultraviolet
radar
visible light
x-rays

Explanation:

To determine which waves are absorbed by dense matter like bones or lead, we recall properties of electromagnetic waves. X - Rays have high energy and are absorbed by dense materials (used in X - ray imaging of bones). Ultraviolet is absorbed by ozone, radar (microwaves) passes through many materials, and visible light passes through air/glass. So X - Rays are absorbed by dense matter.

Answer:

X - Rays