“فَ” (fa)This word introduces a reason or result, like “so that.”Corpus grammarCAUS — prefixed caus particle.
“أَصْبَحَتْ” (ʾaaṣbaḥat)means “So it became” in this verse. It is a verb. an action or state word. Here it is perfect verb, verb pattern four, third person — feminine — singular.Corpus grammarV — third person feminine singular perfect verb.