why do gas particles spread out to fill a balloon?\nthe particles are locked in place.\nthe particles move…

Brief Explanations:

Gas particles have weak intermolecular forces and high kinetic energy, allowing them to move freely and spread out to fill the available space like a balloon. Particles that are locked in place are characteristic of solids, and having a definite shape is also a property of solids, not gases.

Answer:

The particles move freely.