Answer:
A. Nitrogen, Oxygen, and Argon
Explanation:
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The central nervous system<span> (</span>CNS) is the part of the nervous system<span> consisting of the brain and spinal cord.
A. Brain
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Answer: Multicellular organisms are organisms that are made up of more than one type of cell and have specialized cells that are grouped together to carry out specialized functions. Similar cells are grouped into tissues, groups of tissues make up organs, and organs with a similar function are grouped into an organ system.
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