Question

Which elements listed below threaten our marine ecosystem?

increase biodiversity
non-native species
oil spills
erosion

Answer 1

Oil spills and non-native species threaten our marine ecosystem.

Answer 2

Non-native species are introduced into the ecosystem and ruin it. Oil spills pollute the water killing lots of life. Erosion from agricultural uses pollutes the water. Therefore, the answer to your question is non-native species, oil spills, and erosion.