Question

Why the caps of a pen have hole?​

Answer 1

Answer:

Pen caps have a small hole to prevent choking if swallowed and to equalize the pressure inside the pen to keep it from leaking

Answer 2

Answer:

Pen caps have a small hole to prevent choking if swallowed and to equalize the pressure inside the pen to keep it from leaking.

Explanation:

it also doesn't stop the flow of ink flowing out of the pen