I believe the answer is: Exosystem
In Bronfenbrenner model, exosystem refers to the layer of community that contains things that do not affect individual behaviour directly.
This could include thinng such as the existence of establishment in the community, the working hours of the parents, soil availability, etc.
The view of disability changing in the United States, according to david mechanic is that an increasing view that persons with any impairment can meet most of the demands of everyday living. According to him the increasing view of that person woth impairment can meet most of the demand of everyday living.
Answer: the U.S military has maintained a defensive role since the cold war. Taking over more land is a very pricy thing for the military.
