Answer:
to save the record of their adventurous journey
I just took an exam with this question and i put down a and got it right
The answer is<u> "Stratified sampling".</u>
Stratified sampling alludes to a sort of testing strategy . With stratified sampling, the specialist isolates the populace into discrete gatherings, called strata. At that point, a likelihood test (regularly a straightforward arbitrary example ) is drawn from each gathering.
Stratified sampling has a few favorable circumstances over straightforward irregular examining. For instance, utilizing stratified examining, it might be conceivable to decrease the example measure required to accomplish a given exactness. Or on the other hand it might be conceivable to expand the accuracy with a similar example measure.
The answer is "negative reinforcement".
Negative reinforcement refers to a term portrayed by B. F. Skinner in his hypothesis of operant conditioning. In this a reaction or conduct is fortified by halting, evacuating, or maintaining a strategic distance from a negative result or aversive boost.