Difference between a nasal and a oral sound

State the differences between the oral and nasal sounds

Answer:

The difference between them is caused by the position of the soft palate. 
Nasal sound : the air from the lungs get through the nose (when the soft palate is down) close the ways to the mouth and open the ways to the nose [ m, n, ŋ ]
Oral sound: The air-stream get through the mouth when the soft palate is up./.