What does it mean if a task is described as "strenuous"?

When a task is described as "strenuous," it indicates that the activity requires a significant amount of effort or exertion. This term is often associated with physical activities that demand strength, stamina, or intense concentration, making it clear that such tasks can be quite challenging.

The essence of describing something as strenuous lies in its demand for high levels of physical or mental energy, suggesting that the person undertaking the task may experience fatigue or difficulty due to the intensity involved. This aligns perfectly with the correct choice.

Other options do not capture the essence of "strenuous" accurately; for instance, describing a task as easy, simple, or involving deception does not reflect the demanding nature of a strenuous activity.