— Nominative case (Именительный падеж), as it is the subject.

Осветило (что?) — This is the Accusative case because it is the object of the action.

— Genitive case (Родительный падеж), answering the question "tops of what? ". Step-by-Step Breakdown 1. Identify the subject and predicate

The answer to Exercise 234 in the 3rd-grade Russian language textbook by T.G. Ramzaeva involves identifying the main parts of a sentence and determining the case of nouns. Exercise Solution