It’s there a question here-
To create Unity in a piece of art, everything needs to look as if it belongs together. <span>There are lots of ways to achieve unity within a work of art. Three ways to achieve unity are by proximity, repetition, and continuation. </span><span>Proximity implies that elements placed close together have a better chance of looking as though they belong together or are part of the same group. </span><span>Repetition implies that elements which repeat within a work of art will tend to unify a design. </span><span>Continuation is a way to achieve unity when one element of the composition is connected, usually by a line or edge, to another element in the composition.</span>
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Iron use appears in Nok culture by at least 550 BC, possibly earlier, being smelted for tools and all that jazz
Agogic Accents stress which is perceived solely because of prolongation of duration, not due to increased volume or pitch variation
so I'll say duration and pitch
