What is “pillaring" and "retreat mining" and why is it so dangerous?

Heat from earths interior and pressure from overlying rock transform the remains of marine sediments into

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

Ture or false evidence for evolution includes millions of fossils