The loss of strength of a signal during propagation is referred to as attenuation. This happens due to energy loss, resistance in the medium, and other factors that weaken the signal as it travels.
Step 1: Attenuation refers to the reduction in the amplitude and strength of the signal as it travels through the medium, whether in wires or free space. This is a common phenomenon in communication systems. Thus, the correct answer is attenuation. \bigskip
The following graph indicates the system containing 1 mole of gas involving various steps. When it moves from Z to X, the type of undergoing process is: