Please give me answer fast
Please expert answer me
I don't understand this question
Of all parts in one thread

Here in this question, you have the identify the part / organ in the respiratory system.

(a) Nose / Nasal cavity
(b) Singular: Bronchi and Plural: Bronchioles
(c) Singular: Alveolus and Plural: Alveoli
(d) Diaphragm

Hope this helps !