A forest ecosystem has different levels of organization. Which arrangement orders the levels of organization from the largest level (with the most living things) to the smallest level (with the fewest living things).

Groundhogs inhabiting a meadow environment drink water and rely on plants, including clover, for food. Which of the following terms describe BOTH the water and the clover that the groundhogs consume? Choose the TWO that apply.

The American Plains bison is a grassland species that eats mostly grasses. By the late 1800s, hunting came close to causing this animal to disappear from the western United States. In the early 1900s, landowners and the U.S. government took steps to save the bison. The graph shows data collected in northern Yellowstone National Park between 1902 and 1915. What information does the y-axis values on the graph represent?

The American Plains bison is a grassland species that eats mostly grasses. By the late 1800s, hunting came close to causing this animal to disappear from the western United States. In the early 1900s, landowners and the U.S. government took steps to save the bison. The graph shows data collected in northern Yellowstone National Park between 1902 and 1915. Which of the following events could have caused the change shown in the graph? Choose the TWO that apply.