Description:

The correct answer is:

High pressure

Explanation:

High-pressure systems are generally associated with calm, clear, and stable weather. The air is descending, which inhibits cloud formation and leads to fair conditions.

Low-pressure systems bring cloudy, windy, and often stormy weather due to rising air and condensation.

El Niño is a climate pattern rather than a specific weather system. It can disrupt typical weather patterns globally, sometimes causing more storms or droughts, depending on the region.

✅ So, the calm weather is most closely linked with a high-pressure system.