After studying very hard last semester, Sasha got very good grades in all her courses. She felt proud of herself, a very good feeling. This semester, Sasha is once again studying very hard. It appears that good grades are for Sasha's studying behavior.

positive reinforcers

Explanation:

In psychology, there are four distinct types of reinforcement including positive, negative, extinction, and punishment and comes under the operant theory conditioning.

Positive reinforcers: In psychology, the term "positive reinforcers" is described as a phenomenon that encompasses the inclusion of a specific reinforcing stimulus that generally follows a behavior and therefore it makes sure that the given behavior will occur or happen in future again.

In the question above, the given statement signifies that good grades are positive reinforcers for Sasha's studying behavior.

abolish

do away with

unanimous

in complete agreement

secede

separate; break free

inauguration

starting a new position with a formal ceremony.

cooperationist

people who wanted the north to cooperate with the south

surrender

to give up

volunteer

perform a service for free

draft

involuntary service in military

retreat

withdraw; move away from enemy

advisor

expert who gives advice

explanation: