What is the most accurate description of the gaseous state of matter?

The gaseous state of matter is characterized by particles that are widely spaced and move freely, resulting in no fixed shape or volume. Gases expand to fill their container, and their density is much lower than that of solids and liquids. Additionally, gas particles collide with each other and with the walls of their container, leading to pressure. This state of matter is also highly compressible due to the large amount of space between particles.