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>
Answer:
1. The steady pulse in the music
2. Rhythms that are off the beat
The Inca Empire was a vast region extending over 2500 miles along the mountains/ coast of South America. It extended through present day Ecuador, Peru, Chile and small regions of surrounding countries.
