kingdom of koguryo Buddhist sculptures produced during this time, reflected styles prevalent in China's Northern Wei dynasty.
ignore the crackhead above, his is wrong. I just did it
 
        
                    
             
        
        
        
Answer:
The answer is pitches and timing
Explanation:
 
        
             
        
        
        
I'd say the fourth option is the answer. It sounds the most sensible.
(I'm sorry if I'm wrong)
        
                    
             
        
        
        
<span>Serialism is a compositional technique in which a</span><span> series of rhythms, dynamics, or tone colors could serve as a unifying idea. Arnold Schoenberg was the pioneer of such method when he composed the twelve-tone technique. Some of his contemporaries during that time period also attempted to do such composition but they were trying to establish it as form of post-tonal thinking.</span>