Final answer:
Option (A), The gene for antifreeze proteins is most commonly associated with certain species of fish that live in polar waters, helping to prevent their blood from freezing.
Step-by-step explanation:
The gene for antifreeze proteins has been found in various organisms that live in cold environments. One particular example is certain species of fish that dwell in polar waters. These fish have antifreeze proteins in their blood that prevent ice crystals from forming and damaging their cells.
This adaptation allows them to survive in temperatures that would otherwise freeze their blood. In contrast, some plants also produce antifreeze proteins to protect their tissues during cold periods. However, the specific gene for antifreeze mentioned in the question is most closely associated with fish that need to survive in freezing conditions.