Answer:
Natural selection in a stable environment favors specialist because specialized organisms have a better chance of survival and reproduction in a specific ecological niche. By adapting to the specific environmental conditions of their niche, specialists can efficiently use resources, avoid predators and competitors, and reproduce more successfully than generalists. In a stable environment, there is little variation in environmental factors, which means that specialization is more effective than generalization. Therefore, organisms that are well adapted to their specific ecological niche have a greater chance of passing their genes onto the next generation, leading to the evolution of specialized traits. Ultimately, natural selection favors the traits that increase an organism's ability to survive and reproduce in a particular environment.