Q.Would it be easier to drink water with a straw on the top of Mount Everest ?

Drinking through a straw works only because the atmosphere pushes the liquid up when you reduce the pressure inside the straw, so the answer depends on the atmospheric pressure available. …

The question tests whether we understand how a straw actually works and how altitude affects it.

When you drink through a straw, you do not really "suck" the water up. Instead, you lower the air pressure inside your mouth and the straw; the higher atmospheric pressure acting on the surface of the liquid outside then pushes the liquid up the straw and into your mouth. So the driving force is the atmospheric (external) pressure. …