Explanation:

- Diffusion: This is the process through which cultural traits spread from one group to another. It involves the exchange and adoption of ideas, values, and cultural practices.

- Evolution: This refers to the gradual development and change of cultures over time. It does not specifically address the transfer of traits between distinct groups.

- Assimilation: This occurs when a cultural group is absorbed by another, often losing its distinct identity in the process.

- Accommodation: This involves adjustments and adaptations without complete assimilation or integration. Different cultural groups coexist, maintaining their distinct identities.

- Diffusion is the correct answer.

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