A point-to-point communication mode is seen in
satellite cable communication
television transmission
fax transmission
FM radio transmission
C.
fax transmission
FAX transmission is a correct option, because the electronic reproduction of a document at a distant place is known as facsimile transmission (Fax).
If the heights of transmitting and the receiving antennas are each equal to h, the maximum line-of-sight distance between them is (R is the radius of the earth)