Question

1. what is one way that human activities have disrupted the ecological balance in north american ecosystems?

a. increased water quality

b. enhanced natural habitats

c. introduction of invasive species

d. reduction of industrialization

Explanation:

To solve this, we analyze each option:

• Option a: Increased water quality would not disrupt ecological balance but improve it, so it's incorrect.
• Option b: Enhancing natural habitats is a positive action for ecosystems, not a disruption, so it's incorrect.
• Option c: Introducing invasive species by humans (e.g., through trade, accidental release) can outcompete native species, disrupt food webs, and alter habitats, thus disrupting ecological balance. This is a common human - caused disruption.
• Option d: Reduction of industrialization would likely reduce pollution and other negative impacts on ecosystems, so it's not a disruption.

Answer:

c. Introduction of invasive species