<span>The number is seven, with a tolerance of two items more or less. We can code in approximately seven items that we have heard, with some people averaging up to nine items and others as few as five items. This, however, does not take into effect the ability for people to "chunk" items together.</span>
Answer:
Sea Level Changes late Holocene sea level ( BC) Holocene delta development worldwide (3500 BC) By 4000 BC sea level rise began to slow and deltas begin to form. ... A notable example is the mesopotamia delta (3200 BC) in times leading up to the great flood. This is a condition that had not existed for 120,000 years..............
Source : Book
The answer that makes sense is C. Habitat Destruction.