Final answer:
The LEED certification system offers four levels of certification for projects: Certified, Silver, Gold, and Platinum.
Step-by-step explanation:
The LEED (Leadership in Energy and Environmental Design) certification system offers different levels of certification for projects. There are four certification levels available to a LEED project: Certified, Silver, Gold, and Platinum. These levels are determined by the total number of points earned in various categories such as sustainable site development, water efficiency, energy and atmosphere, materials and resources, indoor environmental quality, and innovation.