Final answer:
Silas can identify music composed in the Baroque period by listening for ornamentation, which refers to the decorative musical elements commonly used during that time.
Step-by-step explanation:
When trying to distinguish music selections from different time periods, Silas can look for certain components that are characteristic of specific periods. To identify music composed in the Baroque period, he can listen for ornamentation. Ornamentation refers to the decorative musical elements that were common in Baroque music, such as trills, grace notes, and melodic embellishments. These ornamental features were highly valued during the Baroque period and can serve as a clue to identify music from that time period.