Read the excerpt from the code book. what part of speech is the underlined word?

Adjective

Explanation:

When we say encryption product, the word encryption modifies the noun product. So in this case, encryption is an adjective. It's like when we say apple pie. Apple modifies the noun pie, so in this case, the word apple is an adjective. Another example would be facial expression. Facial in this case modifies the noun, expression.

not only is it colder, it also becomes darker, less salty, and more dense.