What group grew larger as a result of the triangle shirt waist factory fire?

The group that grew larger as a result of the Triangle Shirtwaist Factory fire was the labor movement, particularly among garment workers. The tragedy highlighted the unsafe working conditions and lack of regulations in factories, leading to increased public awareness and advocacy for workers' rights. This spurred the growth of labor unions and organizations that fought for better safety standards, working conditions, and fair wages. The fire ultimately galvanized support for labor reforms and strengthened the collective power of workers.