Identify the choice that best describes the underlined word.

However, when a science article is about something that strongly appeals to me, such as snowflakes, I become interested.
(1 point)
Responses

article
article

adjective
adjective

proper adjective
proper adjective

adverb
adverb

proper adjective

The underlined word "such as" is functioning as an adjective, describing the noun "snowflakes."