[Solved] Points inside the PPF are all A) unattainable and have fully employed resources. B) attainable and have fully employed resources. C) unattainable and have some unemployed resources. D) attainable and have some unemployed resources. E) unaffordable. Music: An art form and cultural activity that involves the creation of melodies, rhythms, and sometimes lyrics, to produce compositions that can be performed or listened to. Timbre: The quality of a musical note or sound that distinguishes different types of sound production, such as voices or musical instruments. Pinna: The external part of the ear, which acts as a funnel to direct sound waves into the ear canal. Neural Firing: The process by which neurons send electrical impulses down their axons to communicate with other neurons.