Compare abyssal and hadal zones in terms of depth, pressure, temperature, and typical communities.

• A. The abyssal zone lies about 4,000-6,000 meters deep with high pressure, near-freezing temperatures, and low light; the hadal zone is deeper than about 6,000 meters in trenches and has even higher pressure and low temperatures; communities include adapted invertebrates and microorganisms, with specialized fish in hadal trenches.
• B. Abyssal zone is warm and bright with abundant light.
• C. The abyssal zone is at shallower depths than 1,000 meters and contains abundant sunlight.
• D. The hadal zone is found in shallow coastal lagoons.

Answer: (B)