Question

human activity has had ______ on the natural balance of earth’s ecosystems.
choose one option
a a positive effect
b a negative effect
c no effect
d an unclear effect

Explanation:

Human activities like deforestation, pollution, overexploitation of resources, and climate change - inducing actions (e.g., burning fossil fuels) disrupt Earth's ecosystems' natural balance. These activities typically lead to habitat destruction, loss of biodiversity, and climate imbalances, which are negative impacts. So human activity has had a negative effect on the natural balance of Earth’s ecosystems.

Answer:

B. a negative effect