What is a common cause of clogged drains?

A common cause of clogged drains is the accumulation of grease and debris. Over time, substances like oils, fats, and food particles can build up within the plumbing system. When grease is washed down the drain, it cools and solidifies, leading to blockages. Similarly, debris such as hair, soap scum, and foreign objects can combine and create substantial clogs that restrict or completely block water flow.

Understanding this, it's essential to manage what goes down the drain. Using drain covers to catch hair and not pouring grease down the sink are practical preventative measures to maintain clear drains. Other options, while they may relate to plumbing issues, do not commonly lead to clogs as directly or frequently as grease and debris accumulation does.