Final answer:
The correct answer to the riddle "What has three feet but cannot walk?" is a tripod. A tripod is a stand with three legs designed to hold cameras steady, making it incapable of walking.
Step-by-step explanation:
The question asks, "What has three feet but cannot walk?" Among the options provided, the correct answer is a tripod. A tripod is a three-legged stand that supports a camera or other apparatus.
It is designed to hold something steady without being capable of locomotion on its own, thus it cannot walk.
While a chair, a table, and a stool may also have three legs, the essential purpose of these items—as per the arguments surrounding the essence of a chair—is for sitting or holding objects, respectively, and not necessarily specified by the number of legs they have.
The context of a tripod is more suited to the description provided by the riddle.
To measure the height of objects like a tripod or a floor lamp, one would typically use a measuring tape with units like feet, yards, or meters.