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Archaeological evidence from about 1 million years ago suggests that the earliest forms of human communication took to the form of:

User Kasandra
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The correct answer is signaling devices.
At this point, our ancestors couldn't yet didn't yet have an established writing system, or a language of their own - which is why they used things such as fire to communicate. They utilized various types of signals to deliver their message, until the earliest form of language was invented.
User MD Jahid Hasan
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