Answer:
I'm no paleontologist but my answer would be:
Throughout time the tectonic plates slowly shift. This causes certain things fossil or not to be in landmasses thousands of miles away.
I think that a) is chemical, and b) would be chemical
<span>The nature flows from high to low to form the equilibria in temperature, pressure or concentration. Winds blow from high pressure area to low pressure zone. Colder winds occur from high pressure area while dry air are formed from low pressure area. Ocean currents flow from warm breeze to cold breeze in day and reversed during night.</span>