
Answer:
Basically Travis is giving a quick lesson on the food chain. If you get rid of one species, you end up eradicating the species that feeds on it.
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"All right," Travis continued, "say we accidentally kill one mouse here. That means all the future families of this one particular mouse are destroyed, right?"
"Right"
"And all the families of the families of the families of that one mouse! With a stamp of your foot, you annihilate first one, then a dozen, then a thousand, a million, a billion possible mice!"
Explanation: