What is the term for the classical conditioning technique that involves gradual, hierarchical exposure to a feared situation or object in a real or imagined way

Systematic desensitization.

Explanation:

Systematic desensitization refers to a  psychological treatment that includes relaxation techniques, anxiety hierarchy development and gradual exposure to the feared item or situation. Such treatment seeks to suppress a phobia's fear response, and gradually replace a calming response to the conditioned stimulation with counter conditioning. The relaxation training may include gradual relaxation of the muscle, calming sights, and sounds, and/or guided imaging.

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explanation:

agreeableness is a personality trait manifesting itself in individual behavioral characteristics that are perceived as kind, sympathetic, cooperative, warm, and considerate.

the best and most correct answer among the choices provided by the question is the second choice "less supportive to the war of 1812"

the war of 1812 was a military conflict that lasted from june 1812 to february 1815, fought between the united states of america and the united kingdom, its north american colonies, and its native american allies.

i hope my answer has come to your . god bless and have a nice day ahead!