The boundary between the piedmont and the coastal plain is known as the a) foothills. b) fall line. c) mineral pond. d) barrier islands.

Hello there!

The boundary between the Piedmont and the Coastal Plain is known as the
fall line.

Correct B. Fall Line

Historians are researchers of the past or people who understand the history of people. with this field, they must possess qualities such as being unbiased, patient, efficient reader, has a knack for logic and critical thinking and reasoning, disciplined, open-minded, resourceful, with good analytical ability, good reasoning skills and problem solving!

Why the planet stays in orbit is because of inertia (object stays in motion until a force changes it’s motion) also the atmosphere and gravity!