What are the lines called that show land elevations on a contour map?

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

In the construction of new housing development, which factor of production can be categorized as land?

Where would you be most likely to find a freshet?