Answer:
D it is taken in from the air
Explanation:
Carbon dioxide is in the air and plants use it to make food.
An ecosystem is like a machine that cycles matter by using: captured energy.
Hope this helps (:
Microorganisms that infect the middle ear cavity most frequently come from the pharynx.
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What is pharynx?</h3>
- A hollow tube called the pharynx extends from the back of the nose down the neck and finishes at the top of the trachea and esophagus.
- The nasopharynx, oropharynx, and hypopharynx are the three components of the pharynx.
- The pharynx, sometimes known as the throat, is a component of the digestive and respiratory systems.
- It transports food, liquid, and air from the mouth and nose downward.
- Common infections like tonsillitis and a sore throat can spread to the pharynx.
- The throat is a muscular tube that resembles a ring and serves as the conduit for liquids, food, and air.
- It connects the mouth and nose to the breathing passages and the esophagus and is situated behind the nose and mouth.
Learn more about pharynx here:
brainly.com/question/75628
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The answer is A because the heart pumps blood from the heart through pulmonary artery that is low in oxygen and high in carbon dioxide concentration, to the lungs.
