The _______ inside a balloon exerts pressure in all directions and makes it blow up.MassSpaceAirNone of these

The correct answer to the question is Air.

Explanation:

Inside a balloon, the gas contained is primarily air. Air is composed of various gases such as nitrogen, oxygen, and small amounts of other gases. When air is pumped into the balloon, it occupies space and spreads out, exerting pressure against the inner walls of the balloon. This pressure is exerted equally in all directions due to the random motion of gas molecules. As the balloon fills with air, it expands until the elastic properties of the balloon material balance the pressure exerted by the air.

The correct option "Air" is relevant because it directly answers what fills the balloon and causes it to inflate by exerting pressure outward, allowing the balloon to maintain its shape and volume. The other options do not correctly describe the contents that would cause the described effect.