A person living in Shimla observed that cooking food without using a pressure cooker takes more time. The reason for this observation is-

1. Pressure increases

2. Temperature decreases

3. Pressure decreases

4. Temperature increases

Hint: The boiling point of water, or any liquid, varies according to the surrounding atmospheric pressure.

Explanation:

At high altitudes, atmospheric pressure is low. Therefore, liquids at high altitudes boil at lower temperatures in comparison to that at sea level hence pressure cooker is used for cooking food which otherwise takes more time.