What is a dynasty?

1: an ever changing system of rules and laws

2: a series or elected emperors who have absolute power

3: an empire in which women hold positions of power

4: a ruling family that remains in power for many years

D option 4 A ruling family that remains in power for many years

definition: A dynasty is a sequence of rulers from the same family, usually in the context of a feudal or monarchical system, but sometimes also appearing in republics. Alternative terms for "dynasty" may include "house", "family" and "clan", among others.

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.