The answer is A.
Hope this helpss
<span>From the US Postal rate page...</span>
Westward expansion, the 19th century movement of settlers Into the American west opened up Louisiana Purchase and was fueled by the gold rush and the Oregon trail and a belief in “manifest destiny”
Quills function a a shield made of barbs. They can also be driven into the predator. Once a porcupine has stuck its quills into an enemy, the porcupine needs to quickly separate from the quills. ... The force to help the release of the quills is supplied by the contact with the would-be predator.
biokids.umich.edu
I believe the answer is: Society in general.
For example, murder is considered as a criminal behavior.
Even though when a person killing another person do not directly cause damage to the whole society, the killer's existence become a threat that diminish the quality of life in that society.
