Answer:
Explanation:
The skeletal system
The skeletal system works as a support structure for your body. It gives the body its shape, allowing movement.
Answer:
produce energy without using fossil fuels.
Explanation:
People can use renewable energy sources, such as solar and wind power. Renewable energy sources help reduce acid rain because they produce much less pollution.
A species could gain negative traits through evolution. So, evolution does not always mean progress.