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Olmecs are considered to be a mother culture because they are the ancestors of numerous other groups and civilizations that arose later in the Americas. They lived as early as 1500 B.C.
Answer:
can we see the options ? :))
<span>The correct answer is Changing climates and nomadic enemies forced them to resort to alternative forms of sustenance. Shifts in climate force transitions in lifestyle. Invasions by nomads also compelled them to seek other ways of sustenance. As a result, they had to return to hunting and gathering at times. </span>
High reliability but inadequate standardization
