Justin notices a particular type of caterpillar feeds only on cottonwood trees in his neighborhood. in which way has justin increased his scientific knowledge

Justin notices a particular type of caterpillar feeds only on cottonwood trees in his neighborhood.In which way has Justin increased his scientific knowledge, Justin increased his powers of scientific observation. His observation is empirical evidence. Empirical relies on observation  and experimentation.

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Scissors and a seesaw both cut things that’s the only comparison