Which structure of the respiratory system connects the pharynx to the trachea? 1. bronchi 2.larynx 3. nasal cavity 4.lungs

Larynx

Explanation:

The larynx is a cartilaginous structure inferior to the laryngopharynx that connects the pharynx to the trachea.

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.