In the first sentence, the phrase “what’s called the greenhouse effect” presents a/an?

Question by ase: In the first sentence, the phrase “what’s called the greenhouse effect” presents a/an?
Scientists generally agree that Earth is getting warmer due to what’s called the
greenhouse effect. A greenhouse used for plants stays warm because sunlight and
heat coming through the glass roof are mostly trapped. The heat doesn’t radiate
back into the atmosphere because it’s partly trapped by the glass. Something like
that happens on Earth. The atmosphere acts like a blanket that keeps the Sun’s
heat from leaking away into space.

A. bias. C. illustration.
B. cause. D. effect.

Best answer:

Answer by wickedbraniac
C. illustration

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