Final answer:
Arias became the focal point of operas because they allow for emotional expression and provide a moment of reflection for the audience.
Step-by-step explanation:
The reason why Arias became the focal point of operas is due to their importance in the storytelling and emotional expression of the characters. An aria is a solo song performed by a main character that usually expresses their inner thoughts, emotions, or desires. It allows the audience to connect with the character on a deeper level and provides a moment of reflection and introspection within the larger narrative of the opera. The use of Arias adds depth and complexity to the storytelling and has become a defining feature of operatic performances.