Final answer:
The cave and Aunt Pearl's apartment differ from the gym in terms of their nature, atmosphere, and purpose.
Step-by-step explanation:
The cave and Aunt Pearl's apartment are different from the gym in a few ways. Firstly, the cave is a natural formation, while the gym is a man-made structure. Secondly, the cave is dark and damp, with stalactites hanging from the ceiling and stalagmites rising from the floor, creating an eerie atmosphere. On the other hand, Aunt Pearl's apartment is a cozy and comfortable living space, with furniture, decorations, and modern amenities. Lastly, the gym is a place for physical exercise and training, equipped with exercise machines, weights, and sports equipment, while the cave and Aunt Pearl's apartment do not serve that purpose.