"Four legs" typically refers to the physical structure of animals that have four limbs, such as dogs, cats, and horses. This quadrupedal design allows for stability and balance, making it easier for these animals to run, jump, and navigate various terrains. In addition to animals, the term can also apply to furniture, like tables and chairs, which often have four legs for support. This design helps distribute weight evenly, ensuring stability and preventing tipping. Four-legged structures are common in both nature and human-made objects, highlighting their functional advantages.