Final answer:
Cork is the product harvested from trees, specifically from the outer bark of the cork oak tree. It is commonly used for making wine stoppers, flooring, and insulation material.
Step-by-step explanation:
The product harvested from trees mentioned in the options is Cork. Cork is the outer bark of the cork oak tree and is commonly used for making wine stoppers, flooring, and insulation material. It is a sustainable and renewable resource that can be harvested without causing harm to the tree.
Learn more about Cork as a product harvested from trees