Which of the following is not a function of the trachea?
a. provide a pathway for air to enter the lungs.
b. provide a pathway for air to exit the lungs trap dust and debris to prevent it from entering the lungs.
c. prevent food from entering the lungs.

The correct option is: c.prevent food from entering the lungs

Explanation:

Trachea is a cylindrical cartilaginous hollow pipe that branches into the two primary bronchi of the lungs. It is the passage of air that connects the larynx to the lungs and thus it is also known as the windpipe.

The trachea is lined with a mucous-membrane which moistens and protect the airway. It also traps and prevents the dust and other contaminating particles from reaching the lungs.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.