Which features characterize, in general, music from the classical era?

1.a general free-for-all, as composers were experimenting in every genre
2.pleasing variety and natural simplicity
3.systematic organization and ornate embellishment
4.emotional, imaginative, extreme emotions, and sublime nature

The features like systematic organization and ornate embellishment characterize, in general, music from the Classical Era.

Option 3

Explanation:

The culture of such a music era began at the end of the middle ages in Europe. The definition of classical music itself suggests observers carry great concentration in order to understand its elements.

Because music form is very long while the rhythm is very delicate to analyze, composed of complex harmony or occurrence of multiple melodies at the same duration of time. Therefore, Classical Era music was encouraged by an educated elite who can afford sufficient time in order to understand the basics of such challenging music.