How would one describe a person who is considered lazy?

The adjective "slothful" is used to describe someone who is habitually lazy or not inclined to exert themselves. This term directly conveys a lack of motivation or energy to engage in work or activity, which perfectly aligns with the concept of laziness. In contrast, other choices such as "diligent," "industrious," and "active" all suggest qualities of hard work, effort, and productivity, which are the opposite of being lazy. Therefore, describing a person as slothful aptly captures the essence of laziness, making it the most suitable option.