The diagram illustrates part of the carbon cycle.

Which best describes the diagram?
A consumer is obtaining carbon by breathing it in from the atmosphere.
A consumer is obtaining carbon by absorbing it from the soil.
A consumer is obtaining carbon by eating carbon-based molecules stored in a producer.
A consumer is obtaining carbon by eating carbon-based molecules stored in a decomposer.

C. A consumer is obtaining carbon by eating carbon-based molecules stored in a producer.

Explanation:

Consumers are those organisms which feed on other organisms for getting energy. Plants produce carbon containing compounds such as glucose by using carbondioxode, water and solar energy in the process of photosynthesis. This glucose get by consumers after eating this plant and energy is released in the form of ATP from glucose in the process of cellular respiration. This energy is used by consumers in different activities.

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.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.