What characteristic of a receiver enhances its ability to select desired frequencies?

Selectivity is a crucial characteristic of a receiver that enhances its ability to differentiate between various signals and select desired frequencies. A receiver with high selectivity can effectively isolate a specific frequency or narrow band of frequencies while rejecting others that are outside this range. This is particularly important in environments where multiple signals may be present, as it allows the receiver to focus on the intended signal without interference from adjacent channels.

High selectivity is achieved through various filtering techniques and circuit designs that minimize the receiver's response to unwanted frequencies. This characteristic is fundamental in applications such as communication systems, where the clarity and quality of the desired signal are essential for effective transmission and reception.

In contrast, broadband capability refers to the receiver's ability to operate over a wide range of frequencies, but this does not necessarily enhance the ability to select a specific desired frequency. Range pertains to the distances over which a signal can be effectively received, and gain refers to the amplification of the signal, neither of which directly addresses the capacity to distinguish between different frequencies in a crowded spectrum.