Detailed Explanation:

Answer: Option 1 — Restoration of damaged coral reefs

Biorock technology (also known as mineral accretion technology) uses low-voltage direct electrical current passed through seawater to precipitate dissolved minerals, creating a limestone-like structure on submerged metal frames. This creates an ideal substrate for coral larvae to settle and grow, accelerating coral reef restoration by 3-5 times compared to natural growth rates. The technology also makes corals more resilient to environmental stresses like ocean warming and acidification, making it a valuable tool for marine ecosystem restoration.

📝 Short Notes: Biorock Technology

• Principle: Electrolysis of seawater using low-voltage DC current (1.2-6 volts) causes precipitation of calcium carbonate and magnesium hydroxide on cathode structures
• Structure: Metal frames (usually steel) are placed underwater and connected to a low-voltage power source (solar panels or tidal energy)
• Benefits for Coral Restoration: Accelerated coral growth (3-5x faster), increased coral survival rates (up to 50x higher), enhanced resistance to bleaching and diseases
• Applications: Coral reef restoration, artificial reef creation, shoreline protection, mariculture support
• Developers: Pioneered by architect Wolf Hilbertz and marine biologist Thomas Goreau in the 1970s
• Global Examples: Projects in Maldives, Indonesia, Thailand, Seychelles, and other tropical regions with degraded coral reefs
• India Context: Potential application in Gulf of Mannar, Lakshadweep, and Andaman & Nicobar Islands for coral restoration