3. In the human body, food is transformed into various kinds of energy. The nervous system consists of many cells called neurons. These neurons send electrical signals across the body. This means that in some parts of the human body, the energy transformation is:

Electrical to chemical
Chemical to electrical
Radiant to chemical
Radiant to electrical

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