GM Stir-Lec I is a type of genetically modified organism called transgenic soybean. Think of transgenic soybean as something like a superhero, because it has been created by scientists to have special abilities that regular soybean doesn't have. One of the special abilities of GM Stir-Lec I is that it can resist certain pests and diseases that can harm regular soybean.
When scientists made GM Stir-Lec I, they took some genetic material from a type of bacteria that naturally produces a special protein that is toxic to certain insects. They then put this genetic material into the soybean plant, so that the plant would also produce this same insect toxin. This way, when insects try to eat the soybean plant, they get sick or die because of the toxin. This is like giving the soybean plant a secret weapon to protect itself from enemies.
The name GM Stir-Lec I comes from the fact that the soybean was created by a company called Monsanto, which has a trademark on the name. Stir-Lec stands for "Stable Insect Resistance," which means that the soybean plant is able to resist certain insects for a long time without losing its ability to do so.
So in summary, GM Stir-Lec I is a genetically modified soybean created by scientists to have special abilities that protect it from pests and diseases, using a genetic material from a bacteria that produces a toxic protein.