Answer:
Laura could contact the city and tell them that the sign isn't working and for the time being take a separate, safer route.
Explanation:
A. Pitch
Cause Pitch is like a scale which is also like a level of a sound
Answer:
the answer to the question would be c
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>
