Lia lives in the mountains of Colorado. Her aunt came to visit and had difficulty breathing for a few days until she adjusted to the higher altitude. Which explanation best describes the reason for this difficulty?

How does population distribution reflect a particular region’s economy?

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 formation of the planet uranus is estimated to have occurred approximately when?