What is one effect of early human establishing permanent settlements?

About 12,000 years ago, human communities started to function very differently than in the past. Rather than relying primarily on hunting or gathering food, many societies created systems for producing food. By about 10,000 BCE, humans began to establish agricultural villages.

This had massive ramifications on the social sphere, marking an important departure from past social systems; people lived in larger, denser, and more permanent settlements, and not everyone had to devote their full time to food production. Since there was no need for all residents to devote themselves full time to producing food, specialization within society was made possible. Thus, surplus food, food that did not go directly to farmers’ families, was distributed to members of the society.

Explanation:

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the answers are a b and d