The diminishing in importance and eventual disappearance of a phenomenon with increasing distance from its origin

How do convection currents form underwater mountains?

Which of these has the least impact on the climate of a place

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory