I believe the poetic device is parallelism
Parallelism is a literary device in which parts of the sentence are grammatically the same, or similar in construction. It may be a word, a phrase, or an entire sentence repeated. This technique adds symmetry, effectiveness and balance to the written piece. It is important as it allows the writer to achieve a sense of rhythm and order.
-these rocks started out as some other type of rock
-they have changed their form from their original igneous, sedimentary, or earlier metamorphic form
A water molecule connects together when they meet just how a magnet sticks to another magnet
It is clearly c. go see lunar phases online.
Blank one answer is.......change
blank two answer is.......before
blank three answer is......after
hope it helps !!