Портрет дубровкого и верейского, поведение дубровского в доме троекуровых, поведение верейского в доме троекуровых

The walls of valhalla were hung with shields; its ceiling glittered due to polished spearheads. read the passage. look at the underlined sections marked number (17). there may be a mistake in the way the sentence is written. if you find a mistake, choose the answer that corrects the mistake. if there is no mistake, choose ‘correct as is.’

What is the predicate noun in the following sentence? my favorite flower is the rose.

Voice is the varying of pitch when speaking.