Answer:
NP
Explanation:
It's not an only noun phrase. The fragment consists on two noun phrases which are joined by the preposition "of". The first noun phrase is "the glow" where "the" is a determiner and "glow" is the noun, and the second noun phrase is "the soft candlelight", In this NP, "the" is a Determiner, "Soft" is an adjective, and "Candlelight" is a noun.
Are you looking at diagrams on you work sheet ?
No. "Children in the dark make mistakes" does not have the same meaning as "Mistakes in the dark make children." The first implies that without sufficient light, children would make mistakes, while the second implies that if you make mistakes in the dark, you'll have children.
The opposite of this sentence: "Children in the dark make mistakes", should be "Mistakes are made when Children are in a dark area".
hope this helps