Choose the correct order of pressure belts from equator to poles :

Question

Accepted Answer

Option 4 is the correct answer because it accurately represents the order of pressure belts as one moves from the equator towards the poles. Here's a detailed explanation:

*   **Equatorial Low:** The equator experiences intense solar heating, which warms the air. Warm air is less dense and rises, creating a zone of low pressure. This is known as the Equatorial Low pressure belt.

*   **Sub-tropical High:** As the warm, moist air rises at the equator, it cools and eventually descends around 30 degrees latitude (North and South). This descending air creates areas of high pressure known as the Sub-tropical High pressure belts. The descending air is also dry, which is why many of the world's deserts are found in these regions.

*   **Sub-polar Low:** Around 60 degrees latitude (North and South), warm air from the subtropics meets cold air from the poles. This convergence causes the air to rise, creating a zone of low pressure known as the Sub-polar Low pressure belts.

*   **Polar High:** At the poles, the air is very cold and dense. This cold, dense air sinks, creating areas of high pressure known as the Polar High pressure belts.

**Why the other options are incorrect:**

*   **Option 1: Equatorial low, Sub-polar low, Sub-tropical high, Polar high:** This is incorrect because the Sub-tropical High pressure belt is located closer to the equator than the Sub-polar Low pressure belt.

*   **Option 2: Equatorial low, Sub-tropical high, Polar high, Sub-polar low:** This is incorrect because the Sub-polar Low pressure belt is located closer to the equator than the Polar High pressure belt.

*   **Option 3: Polar high, Sub-polar low, Sub-tropical high, Equatorial low:** This is incorrect because it reverses the order, starting from the poles and moving towards the equator. The question asks for the order from the equator to the poles.

Therefore, Option 4 (Equatorial low, Sub-tropical high, Sub-polar low, Polar high) is the only option that correctly sequences the pressure belts from the equator to the poles, based on their latitudinal location and the atmospheric processes that create them.