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What does evaporation signify?

  1. the passage between the pharynx and the stomach

  2. the process by which water changes from liquid form to an atmospheric gas

  3. an animal organism in the early stages of growth and differentiation

  4. an artifact that is one of the individual parts of which a composite entity is made up

The correct answer is: the process by which water changes from liquid form to an atmospheric gas

Evaporation refers to the process by which water changes from liquid form to an atmospheric gas. This is different from the other options as they do not relate to the scientific definition of evaporation. Option A refers to the passage between the pharynx and the stomach, which is known as the esophagus. Option C refers to an animal organism in the early stages of growth and differentiation, which is known as an embryo. Option D refers to an individual part of a larger entity, which is known as a component or element. Therefore, option B is the most accurate and relevant explanation for what evaporation signifies.