Question

which of the following communication mediums can send signals only the line of sight​

Answer 1

Answer:

microwaves can send signals in the line of sight

Answer 2

Hi mate

Microwaves use line-of-sight transmission. To avoid possible obstructions, such as buildings or mountains, microwave stations often sit on the tops of buildings, towers, or mountains.

Hope it helps （＾_＾）