The lungs, nose, and trachea are organs of the respiratory system. which best describes these organs?

They deliver oxygen to the blood.

Explanation:

The main function of the respiratory system is to provide oxygen to the body and to remove carbon dioxide from the body. Oxygen is transported to all ports of the body via blood vessels from the lungs. The alveolar sacs, present in the lungs, allow oxygen to be transported to the blood and carbon dioxide to be taken up.

The organs of the respiratory system include nose, pharynx, epiglottis, larynx, trachea, Bronchi, Bronchioles, alveolar sacs of the lungs.

it's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.