Select each correct answer.

Question

The red squirrel is a species of tree squirrel that can be found in parts of Europe and Asia. In an experiment, a researcher introduced small populations of red squirrels to two different ecosystems at the same time. The graph below shows the red squirrel population in both ecosystems over three years.

Which explanation(s) could account for the different carrying capacities of the two ecosystems?

Food may be more abundant in the city park because it is left behind by humans.
Increased human activity in the city park may disrupt mating opportunities.
The nature reserve may be much larger in area than the city park.
The number of trees in the city park may be limited by humans.

Answer 1

- Food may be more abundant in the city park because it is left behind by humans.
- The nature reserve may be much larger in area than the city park.