Butterfly's life is a cycle.
Meaning: This sentence describes the cyclical nature of a butterfly's life, from egg to caterpillar to chrysalis to butterfly.
Choice of Words: Butterfly's indicates possession of the life by the butterfly. Life refers to the period of existence of a living thing. Is indicates a state of being. A indicates one instance of something. Cycle is a series of events that repeats itself in the same order.
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