Which description fits the term "tedious"?

The term "tedious" is best described as something that is time-consuming and tiresome. When an activity or task is labeled as tedious, it typically means that it requires a lot of time and effort and is repetitive or lacks interest, making it burdensome or exhausting to complete. This is exactly what option B conveys, emphasizing both the duration and the exhausting nature of the task.

The other descriptions do not align with the meaning of "tedious." Engaging and exciting reflect positive experiences, while quick and efficient suggest a smooth and swift process, and light-hearted and fun imply a joyful or carefree atmosphere. None of these capture the slow, monotonous, and often frustrating essence of something that is considered tedious.