ancient human travelled bcoz-

1. to escape frm natural disasters

2. to meet relatives

3. to discover new places

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They travelled due to changes in climate in search of food IN search of shelter
Ancient human beings have no ideas to how to cook food. So they eat food what they get from trees. But trees grow their fruits and vegetables in their own season (like mango grows in summer). So for existence of their own life they eat fruits and vegetables and travel from place to place and season to season.
2.For shelter.
3.To get rid of natural disasters.
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tense problem but it is good
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