The Esna Lock is like a giant door for boats that helps them move along the Nile River in Egypt. Picture a big bathtub filled with water. When a boat wants to go from one part of the river to another, it needs to go through a lock, just like when you open a door to move from one room to another in your house.
The Esna Lock is an important part of the Nile River because it helps ships and boats travel smoothly. It's like a traffic light for boats, making sure they can pass through safely without crashing into each other.
When a boat reaches the Esna Lock, it enters a big chamber filled with water. Then, the lock's doors close behind it, trapping the boat inside. Next, the lock's gates at the other end open up, allowing the boat to move into a different part of the river where the water level might be higher or lower.
The Esna Lock works like a water elevator. If the boat needs to go upstream where the water is higher, the lock fills up with water, lifting the boat to the higher level. If the boat needs to go downstream where the water is lower, the lock drains the water, lowering the boat to the lower level.
