Introduction
Section outline
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Language is what people use to communicate with each other. They can do this by speaking, writing, waving their hands or moving with their body to show others what they mean. Speaking goes back to the first humans; writing emerged about 5,000 years ago. 
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Words
- emerge = come up for the first time
- humans = human beings , people
- wave = move your hand or an object back and forth or sideways