-  A forest fire starts - The fire surrounds the vicinity - The animals are trapped - Those that survive have their habitat destroyed - The survivors must find a new habitat  What might be the last step of the process?
Ans: Conflict with other animals occur.

-  You inhale - Your diaphragm moves down - Your lungs have more room - Your lungs fill with air - You exhale - Your diaphragm moves back up - Carbon dioxide is exhaled  What might be the last step of the process?
Ans: You start the process over again.

-  Air is pulled into the lungs - Oxygen moves from the lungs into the bloodstream - Air is pushed through the vocal chords - A person talks  What might be the last step of the process?
Ans: Other air is pushed out of the lungs into the environment.

-  Kidneys filter waste out of blood - Composition of blood is regulated - Volume of water in blood is kept constant - PH is kept at a constant level - Kidneys help regulate blood pressure - Kidneys stimulate the making of red blood cells  What might be the last step of the process?
