I think the correct answer is
(A) changing in abiotic factors
Answer: Positive externality
Explanation: Positive externality is the concept in which the service produced and the consumption of that service will provide benefit a third party who is not a part of the process.
While producing fertilizer , it is providing a unintentional benefit to the community surrounding(third party) by keeping the insects away through exerting gases so that they don't cause insect bites or other problem.
Other options are incorrect because negative externalities are negative consequences face by the third party in a process. Comparative externality is related with comparison and pecuniary externality is increment or decrement in market price of service by action of economic actor .
Answer:
classical conditioning that involves relaxation and a hierarchy of fear.
Explanation:
Systematic desensitization: In abnormal psychology, the term "systematic desensitization" is determined as a type of behavioral technique which is being used for the treatment of anxiety disorders, phobias, and fear by many of the therapist and psychologists.
In systematic desensitization, a person is generally being evolved in several "relaxation exercises and eventually, he or she is being exposed to an "anxiety-provoking stimulus" such as place, object, or situation.
The answer is B: Since most southern states would rather agree with the DOE instead of the Constitution, they are going to stand by to honor the details written in the DOE.