What effect does human activity have on many ecosystems? It increases recycling. It attracts rodents. It decreases pollution. It destroys habitats.

It destroys habitats.

Explanation:

Most of the human activities have adverse impacts on the ecosystem. Deforestation for clearing the land to be used for agriculture and residence has led to cutting down a large number of trees. Since forests serve as habitat for a number of wild animals, deforestation has led to the destruction of their habitats. Likewise, addition of pollutant to water bodies contaminate water and reduces oxygen availability to the aquatic species. This makes the water bodies less suitable to support the life anymore.

I would have to say it destroys habitats.