It is going to be D hope this helps
nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)
melting point because the melting point is the heat required to make an object melt anything less than this poitn will not make the substence melt.
Answer:
B
Explanation:
I am not sure but I think it is B. Out of all the answers that one makes sense.
