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What is a tentative theory about the natural world?

  1. a. Identical twin

  2. b. Insulation

  3. c. Immunity

  4. d. Hypothesis

The correct answer is: d. Hypothesis

A The term "identical twin" does not pertain to a theory about the natural world, but rather refers to a biological phenomenon where two individuals have the same genetic makeup. B: "Insulation" is not a term used to describe a theory about the natural world, but rather refers to a material used to prevent the transfer of heat or electricity. C: "Immunity" does not relate to a theory about the natural world, but rather refers to the ability of an organism to resist or protect against a particular disease or toxin. D: A hypothesis is a tentative theory about the natural world that can be tested and potentially proven or disproven. It is a proposed explanation for a phenomenon and serves as the basis for further research and experimentation.