Which of the following is NOT a material produced from limited raw materials?

Wood is a natural material that is sourced from trees, which are renewable resources. As long as forests are managed sustainably, trees can be replanted, allowing for a continuous supply of wood without depleting the material. This contrasts with other options, such as glass, metals, and plastics, which are often derived from finite raw materials that can be exhausted. For instance, glass is primarily produced from silica (sand) and other minerals, metals are extracted from ores found in the earth, and plastics are synthesized from petroleum, a non-renewable resource. Therefore, wood stands out as a material that can be regenerated over time, making it not reliant on limited raw materials in the same way as the others.