Artificial selection is the idea that humans and other organisms have control over this and natural selection is the idea that humans and other organisms have no control and it merely just takes place.
Answer:
One hint is that, if a message is being sent, the "sender" is probably the nervous systems. There are several subsystems to the nervous system, but it regulates and controls virtually all bodily functions. The nervous system monitors your body's temperature, and takes actions to regulate it, such as telling your muscular system to shiver to generate more heat. It sends this message to the muscular system because your muscles cause bodily movement, such as walking, lifting weights, and even shivering.
When your nervous system determines that your body temperature has returned to normal, it again sends a message to your muscular system to stop shivering.
B. CO2 levels in the atmosphere could increase and contribute to global warming problems.
The opposite of evaporation is condensation.
