Answer:
chromatic adaptation
Explanation:
Chromatic adaptation: The term chromatic adaption refers to the ability of human beings visual system to cope up or adjust with changes in the illumination to preserve the object's colors appearances. Due to chromatic adaptation, an object appears to be stable in color irrespective of the wide-variation of different light that might reflect from an object and being observed through an individual's eyes.
In the question above, Brent is studying the chromatic adaptation phenomenon.
Answer:
A. The North did not allow slavery, while the South depended
on it.
Explanation:
The South always needed slavery for its plantations to get money while the North always didn't like slavery because they were mainly based on service and manufacturing industries.
8) Principal
9) Principal
10) Principle
(Not sure about 9 though)