Psychological research on the principles of learning has most directly influenced the development of

psychoanalysis.
behavior therapy.
humanistic therapy.

The answer is: behavior therapy

Behavioral therapy studies how the environment around individuals affect their behavior and the things that we can do in order to change the unwanted behaviors.

The solutions from behavioral therapy is often applicable to individual learning as well.. Rather than sticking with one single method for all individuals as their main method of learning, principles of learning put environment around the individuals and their behaviors into account. By knowing this, we can create a more effective way of learning for different individuals.

the answer is solomon northrup. he was a free-born african american, abolitionist and professional violinist that was drugged, kidnapped and sold as slave in 1841 and remained in captivity until 1853 where he regained his freedom with the of the then-governor of new york, washington hunt. he wrote and published his memoirs "twelve years a slave" in 1853, and in this text, he tells the story of his escape thru one of louisiana's swamps (the great pacoudrie swamp) in which he ended up covered in green slime from crossing the surface of the dead water.