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What are some of the ideas about the cause of the Cambrian Explosion?
This is the answer key The Cambrian Explosion may have occurred due to a genetic revolution.
Furthermore, a rise in the oxygen levels may have allowed animals to become
larger. An additional explanation was that there was an "arms race" to evolve into
an organism that would not be eaten.

But I need someone to paraphrase it, so could someone do that for me or either go to the website where my teacher is wanting the answer from: https://flexbooks. ck12.org/cbook/ck-12-middle-school- life-science-2.0/section/4.7/primar y/lesson/microevolution-and-macroev olution-ms-ls