Question

communications satellites use microwaves instead of radio waves because
microwaves travel more easily through the atmosphere than radio waves
radio waves cannot travel in space
microwaves travel faster than radio waves
microwaves are cheaper than radio waves

Explanation:

All electromagnetic waves (including microwaves and radio waves) travel at the speed of light in space, so microwaves do not travel faster. Radio waves can travel in space, and cost is not the primary reason for satellite use. Microwaves have shorter wavelengths, allowing them to pass through atmospheric interference more effectively for satellite communication.

Answer:

A. microwaves travel more easily through the atmosphere than radio waves