Question

1. which phenomenon occurs when excess nutrients cause algal blooms in the ocean?

a) eutrophication
b) ocean acidification
c) coral bleaching
d) thermal expansion

Explanation:

• Eutrophication is the process where excess nutrients (like nitrogen and phosphorus) cause rapid growth of algae (algal blooms) in water bodies.
• Ocean acidification is related to increased carbon dioxide in the ocean making it more acidic.
• Coral bleaching occurs when corals expel symbiotic algae due to stress (e.g., temperature changes).
• Thermal expansion is about water expanding as it heats up (related to sea - level rise).

Answer:

A. Eutrophication