Question

how does cultural eutrophication affect aquatic ecosystems? it improves biodiversity. it causes the water to get deeper. it disrupts the balance of the ecosystem. it has no significant impact.

Explanation:

Cultural eutrophication is the enrichment of water with nutrients (like nitrogen, phosphorus) due to human activities. This leads to excessive growth of algae (algal blooms), which depletes oxygen when they decompose. This harms aquatic life, reduces biodiversity, and upsets the ecosystem's balance. "Improves biodiversity" is wrong as it reduces it. "Causes water to get deeper" is wrong (eutrophication can lead to shallower water with sediment and plant growth). "No significant impact" is incorrect as it has major negative effects. So the correct option is the one stating it disrupts the ecosystem balance.

Answer:

It disrupts the balance of the ecosystem.