What does "arduous" refer to when describing a task?

"Arduous" refers to a task that is hard and requiring significant effort. When something is described as arduous, it conveys a sense of difficulty and struggle, indicating that it demands perseverance and considerable physical or mental effort to accomplish. This word often applies to tasks that are not only challenging but may also take a considerable amount of time to complete.

The other options describe characteristics that contrast sharply with what "arduous" implies. For example, something that is easy and simple does not require much effort, while exciting and fun tasks are often enjoyable and not inherently challenging. Quick and effortless tasks imply that they can be completed with little to no effort, which is quite opposite to the meaning of arduous. Therefore, when you encounter the term "arduous," it signals the need for determination and hard work.