During which solstice would the sun be at its highest point in the sky in the northern hemisphere

During the summer solstice the position of the Sun is at its highest altitude.

air enters through the nose, moves through the nasal cavity, the pharynx, the larynx, enters the trachea, moves through the bronchi andbronchioles till the alveoli.

not always but somethings can be reproduced in a laboratory.