While yellow is the traditional color for cowardice, Docter and crew used a richer, more vibrant version of the color for Joy, so that left purple for Fear Bill Hader). "Fear was kind of, frankly, the leftover color
I believe the answer is in rock carvings and petroglyphs.
Answer:
And tommorow the entire world
Explanation:
A) Bass
Those were the insturments used.
