The area in which two air masses meet is known as font
The rate of pacific plate motion is 7 centimeters per year.
<h3>Movement of pacific plate</h3>
The rate of pacific plate motion is seven centimeters which is equals to 2.75 inches per year i.e. about the rate at which fingernails grow. The main reason behind the movement of Pacific Plate is due to sea floor spreading from the East Pacific Rise (divergent margin) in the Gulf of California.
While on the other hand, the North American Plate moved to the west and north west due to sea floor spreading from the Mid Atlantic Ridge (divergent margin) so we can conclude that the rate of pacific plate motion is 7 centimeters per year.
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The correct answer is - A famine in Ireland prompts US response.
With the Irish famine of the 19th century, and the response to it by the United States, we have a very nice example of domestic influence on foreign policy.
Namely, the Irish potato famine was so bad, that very large percentage of the Irish population actually died, and the rest of the population was on the verge of starvation. Because of this, lots of people wanted to move out of the country in order to at least be able to have food on the table. This prompted a response from the United States, and they made an exception in their strict foreign policy because of the Irish people, so opened their borders to them in order to help them, thus letting them settle in the country.