The physical state of matter that is characterized by not having a definite volume or shape is the gaseous state. Gases do not have a fixed shape or volume; they expand to fill the container they are in. When the molecules in a substance move fast enough to overcome the forces holding them together, they become a gas.
Examples of gases include oxygen, nitrogen, and carbon dioxide. These substances can change from a solid or liquid state into a gaseous state when they are heated enough to break the intermolecular forces that hold them in a more ordered structure.
In the context of the given options, the correct answer is:
Gaseoso
