Daily changes in the elevation of the ocean surface currents are called

In what climate does shifting cultivation predominate? and, what are its two characteristics?

What is the "great pacific garbage patch"? (a) a large area of marine debris concentrated by rotating ocean currents (b) a large area around the pacific rim where debris collects from natural disasters such as tsunamis (c) an area in the pacific ocean where trash is intentionally dumped due to lack of landfill availability (d) a large trash dump located in hawaii

Which of the following statements about wearher along mountain ranges is correct