Answer:
D
Explanation:
It can't be A as nuclei must be positive.
It can't be B as nuclei must contain at least one proton, and no electrons.
Technically C may be true, but the question is asking about the nucleus. Not the electron cloud. Electrons aren't found in the nucleus. Only protons and neutrons.
Answer:
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An invasive species<span> is a plant, fungus, or animal </span>species<span> that is not native to a specific location (an introduced </span>species<span>), and which has a tendency to spread to a degree believed to cause damage to the environment, human economy or human health.</span>
