Which is the definition of telegraphy?

Question

(1 point)
the science of using or making
• communication systems to transmit or reproduce information
the science of creating sound waves using pulses in a symbolic code
the transmission of radio waves that
• get converted back into sound waves at the receiver
the transmission of signals using
• light waves from things such as lighthouses

Answer 1

Telegraphy is defined as "the science of using or making communication systems to transmit or reproduce information."