Which best describes the underlined word in the sentence?
in northern latitudes, there are visible *lights* in the sky called aurora borealis.
a.
compound subject
b.
complete subject
c.
simple subject

the answer should be b.

explanation:

it should be b because she researched before writing so it would be in past tense. "the author researches her subject before she had written the first draft.

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.