The answer that fits the blank provided above is PACIFIC OCEAN. It is around the Pacific ocean that the tsunami warning system provides protection along its coastal areas. This tsunami warning system is found in the Ford Island and initiates warnings to those areas along the said ocean.
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Westward Expansion and Imperialism Throughout most of the nineteenth century, the United States expanded its territory westward through purchase and annexation. At the end of the century, however, expansion became imperialism, as America acquired several territories overseas.
Explanation: hope this helps
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police by patrolling, security guards they also patrol, society as a whole bc of our social construct, religion by manipulation and personal belief, DEA by sting ops