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

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

Question: -  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 - Erosion starts to occur.  What might be the first step of the process?
Answer:
A plant grows near or on a rock