The attitude of a body is its orientation as perceived in a certain frame of reference; providing a vector along which a spacecraft is pointing is a description of its attitude.
Dynamics is the term for the modeling of changing conditions, due to external forces acting on the body.
Control is the purposeful, designed manipulation of those external forces to determine the craft's attitude. Dynamic response is guaranteed in any natural setting, ergo control is essential to useful application of aerospace craft, as any use of said craft involves moving something from a specific somewhere to another specific somewhere else, as efficiently as possible.
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