It's like a child growing up they grow
The best answer is the first one.
The physical structure of the lines (long, short, medium, shortest) mimic the chipmunk's movement. He runs, he stops, he runs again.
Furthermore, the others can be eliminated simply by the fact that they do not make sense: one would not expect a chipmunk to have a formal education; if the chipmunk is diving he could not also be sluggish; a chipmunk would not have formal and calculated life.
Therefore, the best answer is the first one.
I believe the answer to this is C.
Letter C.mindset and position on the topic