Which term describes a state of being conscious with sense perception?

The term that best describes a state of being conscious with sense perception is "sentient." Being sentient refers to the capacity to perceive sensations and feel emotions; it indicates an awareness of the environment and the ability to respond to stimuli effectively. This concept encompasses not only basic awareness but also the richness of experiences and feelings that an individual may encounter.

In contrast, "soporific" refers to something that induces sleep or drowsiness, which is the opposite of being conscious and aware. "Sluggard" typically describes a lazy person or someone who is slow to act, which does not directly relate to the concept of consciousness or perception. "Staid" refers to someone who is serious, respectable, and unadventurous, which again does not imply an active state of consciousness with sensorial engagement. Thus, the distinction of the word "sentient" as it specifically relates to awareness and perception makes it the correct choice.