Question

When a baby can tell the difference between its mother's voice and other voices, it is distinguishing between two: O timbres O instruments O pitches O volumes​

Answer 1

The answer is pitches, I chose it in my Midterm and got it right.

Answer 2

I would think it is pitches

Step-by-step explanation:

I think the reason why its not instruments is obvious, anyone can make any volume, and I dont know what timbres means sorry.