— Nominative case (Именительный падеж), as it is the subject.
Осветило (что?) — This is the Accusative case because it is the object of the action. — Nominative case (Именительный падеж)
(The tops of the pines turned golden.) Subject: Верхушки (Tops) Predicate: зазолотились (turned golden) 2. Determining Noun Cases: — Nominative case (Именительный падеж)