How do elections in a single member district differ from elections in states that filled their seats at-large

A single member district is a district in which its representative is voted in by the people of the district. At-large is when representatives are elected by anyone living in a state.

Explanation:

For example in New York's 12th congressional district only people living in that district can vote for the congressperson of that district and the rest of the state is filled with other congressional districts. However in states that practice electing their representative at large like Alaska or Delaware there is only one congressional district and everyone living in that state can vote for their representative to represent their entire state. Basically, single member districts are in states with multiple congressional districts and at large seats are the states with only one congressional district. Hope that makes sense

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explanation:

the causes of the dust bowls were severe droughts,   lands became dry and hard, temperature was higher than usual, hot and dry conditions killed crops, high winds. because of those factors, the winds kicked up dry soil and created clouds of dust.