The correct answer among all of the given choices would be the third choice, CLOUDS.
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Answer:
A. active transport
Explanation:
active transport is the movement of a substance across a membrane against its concentration gradient.
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Transmission electron microscope produces the image through a beam of electrons. It is most useful to inspect the morphology, cyrstallization, and magnetic characteristics of a certain sample.
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"Benzaldehyde is an organic compound consisting of a benzene ring with a formyl substituent. It is the simplest aromatic aldehyde and one of the most industrially useful. It is a colorless liquid with a characteristic almond-like odor."
https://www.britannica.com/science/benzaldehyde
https://en.wikipedia.org/wiki/Benzaldehyde