Nothing is underlined, but I assume that the underlined words would be either "to save" or "(not) to spend" or both. In any case, the correct answer would be C - infinitive phrase, because these verbs are in their infinitive form. "Gerund" and "participle" would end in -ing,
Engineer:science
Hope this helps! :)
Answer:
Poor, rich, and weekdays are nouns
Explanation:
I wanna say it helps you become aware of the limits of your own vocabulary