When ryan's boss yelled at him, he did not yell back at his boss, instead, he went into his own office and kicked the trash can. which ego defense mechanism did ryan demonstrate?

Ryan demonstrates displacement. This defense mechanism was described by Sigmund Freud and describes the redress of an impulse, which is usually aggression, towards someone or something else considered as impotent or weak. For example an object, a child or even an animal and serves as a symbolic substitute for the feeling of dissatisfaction that cannot express for fear of consequences or because he feels unable to face.

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The changes to agriculture in the united states since 1900 is that increased mechanization has increased food production, thereby increasing the need for labor. there has been an increased need for higher speeds of food production due the fact that the population in the united states continues to rise.