What factors united the ancient Greeks?

Undoubtedly the geography of Greece—divided and sub-divided by hills, mountains and rivers—contributed to the nature of ancient Greece. On the one hand, the ancient Greeks had no doubt that they were 'one people'; they had the same religion, same basic culture, and same language.

Explanation:

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Peace, helps, and kindness I think.

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  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.