Question 1 multiple choice worth 2 points)
(02.01 lc)wegener attempted to explain the movement of continents but could not identify a source of force strong enough what did scientists eventually identify
as the primary energy source that drives the movement of earth's plates?
convection
friction
gravity
volcanoes

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes