Experts point to the impact of certain physical features, such as landforms, climates, and natural vegetation. ... If you live in the mountains, you're likely to develop a particular culture that adapts to life at a high altitude.
I would say 60 feet. Yards is what you would use to measure a foot ball field. It's way to big of a measurment for a telephone pole. Feet make sense because they are not to big, but not to small.
~Silver
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Answer:
A system is a group of interacting or interrelated entities that form a unified whole. A system, surrounded and influenced by its environment, is described by its boundaries, structure and purpose and expressed in its functioning. Systems are the subjects of study of systems theory
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