Whats most difficult to understand about particles

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

The san andreas fault which runs through california is two plate sliding sideways past one another which type of metamorphoism is most likely to occur along the fault line

How have the russians responded to pollution and environmental challenges? a. russians largely ignore pollution and environmental damage. c. many russians have protested efforts to end pollution because it would mean people lost their jobs. b. russians have begun to focus on better resource management and protecting the environment. d. none of the above.