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If you get lost without a phone or a compass, and you literally can't find north, we have a few tricks to help you navigate back to civilization, one of which is to follow the land.中 主句是we have a few tricks to help you navigate back to civilization, one of which is to follow the land  one of which is to follow the land.是后置定语从句 修饰前面的civilization
If you get lost without a phone or a compass, and you literally can't find north是条件状语从句 在从句中and you literally can't find north是and 连接的并列句