It was interesting to see that findings were separated into two separate time periods—98,000 to 73,000 years ago and 72,000 to 59,000 in two locations. An interesting thought is that the great Toba megavolcano erupted around 74,000 years ago leaving a crater 18 by 65 miles. Did changing conditions force hominids to move from one location to another or change the kinds of things they survived to produce?
I don't see any way it was possible for them NOT to move.
or change the kinds of things they survived to produce?
On the presumption that a megavolcano exploded, they would be forced to move very far to find any kind of 'edible resources' and the chances are very high that those resources (plant, animal) would be quite different from what they were used to.