A directional state is when systems are not static but are steadily moving?

Yes.

Explanation:

Yes, a directional state is refers to a systems that are not static, they are moving steadily in a specific direction. In this state, the body or an object does not remain in the resting position but in continuous motion in a specific direction so we can conclude that in a directional state, the object is not at rest but moves continuously in a particular direction.

i believe

clean air is essential for health and survival

clean air provides nitrogen gas for plant respiration

clean air supplies oxygen that enables living organisms to breathe

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