What is the purpose of the hoover dam? please help

Abasic premise of the national response framework is that: a. most incidents begin and end locally and are managed at the local or tribal level. b. response partners use nonstandard structures to allow for flexible and scalable responses. c. readiness to act encourages response partners to self-dispatch to an incident scene. d. incidents should be managed at the highest jurisdictional level possible.

Asocial science theory focusing on the inborn nature of social traits and the role of evolution in shaping human behavioral patterns. b. the view that society is governed by interrelated parts that make up the smoothly functioning whole. c. the individual's sense of femaleness or maleness. d. behaviors that focus on feelings and relationships among members of a group. e. the belief that men are superior to women and should control all important aspects of society. f. the process of acquiring and internalizing the ideas and behaviors deemed appropriate for males and females by their society. g. behaviors that focus on the accomplishment of specific tasks for a group rather than on personal feelings. h. the physical and biological aspects of male and female. i. cultural attributes of masculinity and feminity. j. provides a hypothesis of why males are dominant and females submissive.

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?