In Pavlov's classic experiments, the repeated presentations of the metronome along with the food was called the step of the classical conditioning process.

acquisition                                                        

Explanation:

Acquisition: In psychology, the term "acquisition" was explained by a psychologist named Ivan Pavlov and is defined as the very first stage related to learning in the classical conditioning process through which a specific response is being established.

In other words, the acquisition is described as a period whereby a particular stimulus tends to trigger a specific conditioned response.

Example: In classical conditioning, when a dog begins to salivate after getting associated with the sound of a bell.

In the question above, the given statement signifies the "acquisition" period.

it is a better alternative

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.