Explanation:

<em>Today, South Africa produces only 4.2% of the world's gold. In South Africa, mining for gold typically involves methods like panning, sluicing, dredging, hard rock mining and by-product mining. </em>
A. Different fossils on different continents. There were the fossils of the same or very similar species found on different continents that could not of swam across an ocean/walk there.
Some did not have animals that could be domesticated around
them.
The Neolithic Revolution was critical because it signified
the transition to agriculture. It is believed that the civilization was driven
largely by environmental changes--a gradual warming that allowed people to
begin cultivating.