8. The outer ear, ..... the fleshy pinna and the auditory canal, picks up and funnels sound waves toward the eardrum. Includes Which it includes Which includes Of which includes

The correct answer is "which includes."

Here's the sentence with the correct phrase inserted: "The outer ear, which includes the fleshy pinna and the auditory canal, picks up and funnels sound waves toward the eardrum."

Step-by-step explanation:

1. Identify the main clause: "The outer ear picks up and funnels sound waves toward the eardrum."
2. Determine the role of the phrase "the fleshy pinna and the auditory canal" in the sentence. It provides additional information about the outer ear.
3. Choose the appropriate connector to introduce this additional information. "Which includes" is the correct choice because it correctly introduces the components of the outer ear.
4. Insert "which includes" into the sentence: "The outer ear, which includes the fleshy pinna and the auditory canal, picks up and funnels sound waves toward the eardrum."