B) herman von helmholtz
The trichromatic color theory<span> began in the 18th century, when </span>Thomas Young<span> proposed that color vision was a result of three different </span>photoreceptor cells<span>. </span>Hermann von Helmholtz<span> later expanded on Young's ideas using color-matching experiments which showed that people with normal vision needed three wavelengths to create the normal range of colors. Physiological evidence for trichromatic theory was later given by </span>Gunnar Svaetichin<span> (1956).</span>
Negative space helps create more space and draws more attention to one specific thing even though there can be multiple things within the piece
Transparent, because transparent means that you are allowing light to pass through, and you do not want a background color.
First off this should this question be in Biology.... and the answer this question is weight, height, level of activity and hormone imbalances.
