Why does it take less time to boil vegetables in cooking pot with lid on than one out a lid . briefly explain ?

When a lid is placed on a cooking pot, it traps the heat and steam inside, creating a more controlled and efficient cooking environment. This allows the vegetables to cook faster as the heat is retained and distributed evenly throughout the pot. Without a lid, heat and steam escape, resulting in a slower cooking process as the vegetables are not being cooked as efficiently.