"Those who are close to vermilion are red, and those who are close to ink are black." This sentence reflects the factors that affect people’s physical and mental development: ( ).

Answer: B

The most important factors affecting human physical and mental development are heredity, environment, education and individual subjective initiative. The environment is the sum of all external factors that directly or indirectly affect people's physical and mental development. This famous saying is intended to illustrate the impact of the environment on people's physical and mental development.

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