It is the theory of just noticeable differences of JND. In the branch of exploratory brain science concentrated on sense, sensation, and recognition, which is called psychophysics, a simply perceptible contrast or JND is the sum something must be changed all together for a distinction to be discernible, recognizable at any rate a fraction of the time
Answer:
Treaties keep countries at bay, so to speak, it keeps wars from starting and it states that certain countries are allies.
Answer:
issues, organs, organ systems, and the human organism.
Explanation:
A is the correct answer.
On April 9th, 1865, after a defeat, General Robert E. Lee (the leader of the traitorous Confederate army) surrendered to General Ulysses S. Grant (the General of the American Army). General Joshua Lawrence Chamberlain, hero of Gettysburg, marked the disbandment and offered parole.
Checks and balances, I'm pretty sure but sorry if I'm wrong