Final answer:
Overfishing, habitat destruction, and invasive species introduction are three ways human activities have altered the environment and ecosystem.
Step-by-step explanation:
Three ways that human activities have altered the environment or ecosystem:
- Overfishing: When humans fish at a rate faster than natural replacement, it can lead to the decline or depletion of certain fish species, disrupting the ecosystem of rivers and coastal waters.
- Habitat destruction: Converting natural habitats like prairies into farm fields can have a significant impact on the ecosystem, as it involves clearing vegetation and disrupting the balance of species that rely on that habitat.
- Invasive species introduction: When an invasive ornamental plant is introduced into a new ecosystem, it can outcompete native plants, disrupt the food chain, and negatively affect the overall balance of the ecosystem.