4. A healthy ecosystem must have producers, consumers, and decomposers. Most decomposers are either fungi or bacteria, Why are decomposers an essential part of
healthy ecosystem?
A Decomposers are a necessary part of the diet of most consumers.
B. Decomposers convert plant material into a form that primary consumers
can use
C. Decomposers make resources available to producers by breaking down
waste materials.
D. Decomposers extract energy from sunlight as they break down plant
materials, adding energy to the system

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