How does corona virus represent the theoretical 5th state of Epidemiology (disease)?

Suggest two reasons why irrigation is important for human development of the desert (4 marks)

Which two following best identify the central themes of this speech in the passage the man in the arena

If we review the changes in the landscape surrounding the great salt lake in utah we can see a change in topography. look at the area to the south of the lake. what changes occurred during the last twenty-nine years? a-erosion of the hills b-an increase in marshland c-flooding of the area and the development of wetlands d-deposition of sediments and an increase in elevation