What term refers to organisms that thrive in extreme environmental conditions?

• A. Food
• B. Euphotic Zone
• C. Extremeophile
• D. Dissolved Organic Carbon

Answer: (C)

Organisms that thrive in extreme environmental conditions are called extremophiles. This term describes life adapted to harsh settings such as boiling vent fluids, freezing polar waters, highly acidic or alkaline conditions, high salinity, or immense pressures found in deep oceans. In marine systems, examples include thermophiles near hydrothermal vents, halophiles in hypersaline environments, and psychrophiles in icy waters. The other options don’t describe living beings: food is something consumed for energy, the euphotic zone is the sunlit layer where photosynthesis occurs, and dissolved organic carbon is a chemical resource in water.