Question: -  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?
Answer: Other air is pushed out of the lungs into the environment.

Question: -  Magma comes up to the surface of the earth - The magma cools - Particles inside the magma move closer together - Crystals are formed  What might be the last step of the process?
Answer: The crystals contain minerals.

Question: -  A plant grows near or on a rock - The plant roots begin to grow - Break apart the rock - The plant acids dissolve parts of the rock - The rocks are broken into more and more pieces  What might be the last step of the process?
Answer:
Erosion starts to occur.