What describes the nucleus of an atom

Protron and neutrons

Explanation:

While the atom is made up of three subatomic particles named protons, neutrons and electrons, the nucleus consists of only protons carrying a positive charge and neutrons with no charge.

Thus, the presence of protons and neutrons describes the nucleus of an atom.

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i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above