How the development of the telegraph contributed to
westward expansion?

Explanation:

The invention of the telegraph system helped America expand westward because it allowed people who were far away from one another to communicate instantaneously. ... The telegraph made this possible. The telegraph allowed the railroad stations in far apart places to communicate easily.

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.