Light affects migration and breeding of marine species. Which factor is primarily influenced by light?

• A. Migration and Breeding
• B. Water Temperature
• C. Salinity
• D. Nutrient Availability

Answer: (A)

Light acts as a signal that marine organisms use to time important life events. The length of daylight and the pattern of moonlit nights provide predictable information about seasons and tides, so many species synchronize their movements and reproductive activities with these cues. This helps them arrive at feeding or breeding sites at the best times and ensures offspring encounter favorable conditions. While light can influence physical factors like surface heating and indirectly affect nutrients through photosynthesis, the direct role of light here is in timing migrations and breeding, making that option the most accurate choice.