The streets drains of Harappa culture were covered with slabs of bricks.

Explanation:

Harappa Culture:
Harappa culture, also known as the Indus Valley Civilization, was one of the oldest urban civilizations in the world. It flourished around 2600 to 1900 BCE in the Indus Valley, which is present-day Pakistan and northwest India.

Drainage Systems in Harappan Cities:
One of the remarkable features of the Harappa culture was the advanced urban planning and infrastructure. The cities of the Harappa culture had well-organized and efficient drainage systems. The drainage systems were constructed to ensure the proper disposal of waste and rainwater from the streets.

Covering with Bricks:
The streets drains in Harappan cities were covered with slabs of bricks. These bricks were carefully laid side by side to create a sturdy and durable covering for the drains. The use of bricks in the construction of drains and other structures was a characteristic feature of the Harappan architecture.

Reasons for Using Bricks:
The use of bricks in covering the drains had several advantages:

1. Durability: Bricks are known for their strength and durability. They can withstand heavy loads and are resistant to weathering and erosion. This made them ideal for covering the drains and ensuring their long-term functionality.

2. Ease of Construction: Bricks are relatively easy to produce and shape. They can be manufactured in large quantities and can be arranged quickly to form a solid covering for the drains. The standardized size and shape of bricks allowed for uniformity in construction.

3. Waterproofing: Bricks have inherent waterproofing properties. When properly laid together, they form a tight seal that prevents water from seeping through. This ensured that the drains remained watertight, preventing any leakage or seepage.

4. Maintenance: The use of bricks made it easier to maintain and repair the drains. If any section of the drain got damaged or clogged, the bricks could be easily removed and replaced without disturbing the rest of the structure.

Conclusion:
In conclusion, the streets drains of Harappa culture were covered with slabs of bricks. The use of bricks provided durability, ease of construction, waterproofing, and ease of maintenance to the drainage systems. This architectural feature showcases the technological advancements and urban planning skills of the Harappan civilization.