Emma drinks water from a glass using a straw. which of these best describes how the fluid moves from the drinking glass to emma’s mouth?

The fluid moved from the glass to Emma's mouth due to reduced pressure in the mouth during the sucking process.

Explaination

When the water is in the glass and the straw is placed in the fluid,there is no flow of fluid up the straw because the Atmospheric pressure outside the glass maintains an equal pressure on the surface of the glass.When Emma sucks in the water with the straw,there is increased volume in the mouth that will create a low pressure zone in the mouth.This in turn will make the higher atmospheric pressure outside the glass force the liquid up the straw to reach Emma's mouth.

the answer is option a.