<span>String art uses coloured string to make geometric patterns.
</span><span>The first person that used it was by an Englishwoman called Mary Everest Boole (1832 to 1916). She used </span><span>straight lines to make curves
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hope that helps!
<span>Balance
</span><span>Proportion
</span><span>Rhythm
</span><span>Emphasis
</span><span>Unity </span>
D is the correct answer.
In the badly drawn diagram attached, you will find the <em>yellow</em> represents wavelength, which is the distance between identical points on consecutive waves.
The <em>green</em> represents the amplitude, which is the distance between the origin (middle) and crest/trough (top/bottom)