How do beaver dams contribute to species diversity in the ecosystem

What is the difference between emigrate and immigrate? ?

How long does it take for saturn to orbit the sun?

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 change has 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