Explain how the image shows the Inca’s contribution to civilization

The Inca Empire, or Inca Empire, was the largest empire in pre-Columbian America. The civilization emerged in the 13th century and lasted until it was conquered by the Spanish in 1572. The administrative, political, and military center of the empire was located in Cusco (also spelled Cuzco) in modern-day Peru. From 1438 to 1533, the Incas used a variety of methods, from conquest to peaceful assimilation, to incorporate a large portion of western South America.

it's no easy i swear it's hard

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.