In his theory of violence, contemporary sociologist Randall Collins includes both individuals who must have skills to carry out violent interactions and the materials and resources that an organization must equip themselves with in order to carry out violence. His theory includes both and components

Micro and macro components

Explanation:

Micro components refers to a short intense act of violence. Often caused by frustration or anger between two individuals while Macro-violence includes victory and defeat in war, and in struggles of paramilitaries and social movements, is shaped by both material resources and social/emotional resources for maintaining violent organizations and forcing their opponents into organizational breakdown.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

answer; i believe the correct answer is prefrontal cortex;