The passengers flying in aeroplane are advised to remove the ink from their pens while going up in the aeroplane , why?

Explanation

To understand why passengers are advised to remove the ink from their pens while flying in an airplane, we can break down the explanation into a series of logical steps:

### Step-by-Step Solution:

1. **Understanding Pressure Changes with Altitude**:
- As an airplane ascends to higher altitudes, the atmospheric pressure surrounding the aircraft decreases. This is a fundamental principle of physics where pressure decreases with an increase in altitude.

2. **Behavior of Fluids**:
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