Final answer:
If the objects mentioned are a violin and a guitar, they would be classified as Chordophones (B. Strings) since both are stringed instruments that generate sound through the vibration of strings, amplified by their resonance with sounding boxes. (Option B).
Step-by-step explanation:
Identifying the family of instruments to which two particular objects belong requires knowledge of the characteristics that define each instrument family. Given the typical classifications used in ethnomusicology, these families are Aerophones (wind instruments), Chordophones (stringed instruments), Membranophones (instruments with a membrane, such as a drum), and Idiophones (self-sounding instruments).
For example, in orchestras, stringed instruments resonate within their sounding boxes to produce sound and woodwind instruments use air columns.
A violin and a guitar, known as string instruments, utilize resonance produced by vibrating strings, amplified by their respective sounding boxes. Meanwhile, flutes and oboes, examples of woodwind instruments, amplify sound through resonance within their air columns.
Given the context, if the objects in question are a violin and a guitar, they would fall under the Chordophones or B. Strings category, as both are stringed instruments and produce sound through the vibration of strings which is then amplified in their sounding boxes. (Option B).