answer: b. moving to San Diego, California
explanation:
an internal migration is when a human moves from one area in a country to another area in that same country.
so, let's look at our options, remembering that the person currently lives in los Angeles, California.
a. Mexico city, Mexico: <em>is mexico inside of the united states? no, so this isn't an internal migration, so therefore this is not the answer</em>
b. moving to San Diego, California:<em> is California inside of the united states? YES, so this is an internal migration, so therefore this is the correct answer</em>
c .moving to Toronto, Canada: <em> is Canada inside of the united states? no, so this isn't an internal migration, so therefore this is not the answer</em>
D. moving to London, England: <em> is England inside of the united states? no, so this isn't an internal migration, so therefore this is not the answer</em>
So, B is your answer.
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