Which of these is a provisioning service— a benefit that is obtained directly from the environment?

Providing building materials.

Explanation:

Provisioning services can be defined as the services that can be obtained directly from the environment or ecosystem.

Example: food, timber, fiber.

These services provide long timber and wooden logs that provide the raw material which is required for the construction of buildings and houses.

This is obtained directly from the environment from plants and trees.

the sphincter muscles at the end of the digestive tract is the anus.