Ameandering river is flowing in a broad, alluvial valley and the river is silt-laden but also moves sand and a small amount of gravel. the government decides to build a dam across the valley for power and flood control. what will happen to the river downstream of the dam?

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.