He dust bowl that occurred in america in the 1930s is a dramatic example of erosion caused by a. deforestation b. overgrazing c. climate change d. agricultural cultivation

Plz i need it now select the correct answer from each drop-down menu. a group of people known as had lived in australia for thousands of years. but in 1770, australia was claimed . in 1851, the discovery of brought thousands of people to australia. later, in 1901, australia was proclaimed an independent .