One of the major contributions social exchange theory makes to the study of intimate relationships is that it: Group of answer choices recognizes that satisfaction is only one component that influences whether a relationship lasts explains how some initially satisfied couples become distressed over time explains how perceptions of rewards and costs may change over time accounts for relationship patterns across the lifespan

answer; cattle ranching on the savanna,and forestry in the amazon;

president reagan was a good presidant and should be presidant if he was still alive

explanation:

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.