Who first began to alter the land to meet their needs? What two techniques did they develop that are still in use?

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

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

Which of the following is defined as combinations of soil particles that vary in size and shape?