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What is a process in which something passes by degrees to a different stage (especially a more advanced or mature stage)?

  1. Excretion

  2. Fallout

  3. Evolution

  4. Fatty acid

The correct answer is: Evolution

Evolution is the process by which different forms of life gradually develop and diversify from earlier forms over long periods of time. It involves gradual changes and advancements in biological traits, behaviors, and characteristics. Excretion (choice A) refers to the process of eliminating waste or unwanted substances from the body. Fallout (choice B) refers to the process of something falling or being deposited, usually with a negative connotation. Fatty acid (choice D) refers to a component of fats that is essential for the body's metabolism and other bodily functions, but it is not a process. Therefore, C is the best answer that describes a gradual passage to a different stage.