6.1.2 The Humans Spread Out

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Migration

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A movement from one country or region to another / Un movimiento de un país o región a otro

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Environment

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the surroundings or conditions in which a person, animal, or plant lives or operates. / el entorno o las condiciones en las que vive u opera una persona, un animal o una planta.

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Adapt

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to adjust or change to suit conditions / para ajustar o cambiar para adaptarse a las condiciones

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Complex

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consisting of many different and connected parts / que consta de muchas partes diferentes y conectadas

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Network

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a closely interconnected group of people or things