The answer to this question is Salvation
Pavlov conduct this research to make sure that the salivation process being done by the dogs is not a result of normal biological process and deepen his understanding on why and how the salivation works.
After making sure that there is no correlation, then he started to teach the associations in order to know whether external stimuli could influence it.
The answer is: :C. It gives the courts the power to invalidate any federal or state law that they believe violates the Constitution.
By having the courts this ability, the judicial branch of the government would had the power to prevent the president of united states and the congress from establishing law that are violating the rights of citizen in united states. It is a form of a balance of power that prevent a certain people in the government from becoming too powerful.
The answer is B Lower Egypt because the lower Egypt is surrounding the delta and upper Egypt is more inland. Hope this helps!
thomas jefferson
please make me the brainliest