-  Networks of trees start forming - The trees die off - The dead material provides nutrients for more trees - The rising trees provide shelter - And more organisms begin to thrive  What might be the last step of the process?
Ans: The ecosystem known as a forest is made.

-  Humans are born as babies - Babies become infants - Infants become children - Children learn skills - Children become teenagers - Teenagers undergo puberty - Teenagers become adults - Adults have children - Adults become elderly  What might be the last step of the process?
Ans: Elderly humans die.

-  Air enters the nose or mouth and travels through the windpipe into the lungs - The lungs have a series of smaller and finer tubes and sacs - Air reaches the smallest and finest air sacs called alveoli - Oxygen travels from the alveoli into the blood - Oxygen-rich blood is carried to the heart - Oxygen-rich blood is pumped throughout the body by the heart - Cells take in the oxygen rich blood and release carbon dioxide rich blood - The carbon dioxide rich blood travels to the lungs  What might be the last step of the process?
Ans: Carbon dioxide travels through the throat and is exhaled.

-  A hurricane usually starts as an organized thunderstorm activity that stretches at least 100 miles across and maintains its identity for more than 24 hours - Under the right conditions it can develop further and start to spin around a low-pressure center - If it develops it&#x27;s classified as a &#x27;tropical cyclone&#x27; or &#x27;tropical depression&#x27; - If the system strengthens and wind speeds rise past 39 mph, the system is dubbed a &#x27;tropical storm&#x27;  What might be the last step of the process?
