Biology

The correct answer is B.a provisioning service.

When a spruce tree is harvested for its wood to be used in construction, it is providing a provisioning service. Provisioning services are the direct products or materials that ecosystems provide to humans. In this case, the wood from the tree is a tangible product that can be used for building, furniture, paper, and other materials.

To clarify the other options:

A.A cultural service refers to non-material benefits people gain from ecosystems, such as recreational, spiritual, or aesthetic values, which isn't rele...