In the year 2011, a scientist from the USA discovered `BISIN`. This discovery is associated with option 1, which states that BISIN is a natural preservative and can extend the life of food for several years.

To understand this better, it is important to note that food spoilage is primarily caused by the growth of bacteria, fungi, and other microorganisms. Preservatives are substances that can inhibit the growth of these microorganisms and help to prolong the freshness and shelf life of food.

The discovery of BISIN is significant because it is a natural preservative, meaning it is derived from natural sources and does not contain synthetic or artificial ingredients. Natural preservatives are often preferred by consumers who are looking for safer and more sustainable options for food preservation.

The ability of BISIN to extend the life of food for several years suggests that it is an effective preservative in preventing bacterial and fungal growth. However, it is important to note that the specific details and applications of BISIN as a preservative may vary and require further research and testing.

In conclusion, option 1 correctly explains the discovery of `BISIN` as a natural preservative that can extend the life of food for several years.