What is the meaning of 'monotonous'?

The term 'monotonous' refers to something that is characterized by a lack of variety and is often perceived as dull or tedious. Specifically, when describing speech or sound, 'monotonous' indicates that it is delivered in a uniform tone or pitch, without any variation that might convey emotion or emphasize different aspects of the content. This can lead to a sense of boredom or disinterest in the listener, as there is no modulation to capture attention or enhance the message being conveyed. Understanding this meaning is essential, as it emphasizes how tone can manipulate the perception of communication. The other choices present contrasting ideas such as diversity, excitement, or frequent changes, which do not align with the fundamental definition of 'monotonous.'