The dream of space travel became a reality.
how does the word reality function in the sentence?

as a predicate adjective

as an object complement

as an indirect object

as a predicate nominative

The answer is a predicate nominative.

Explanation:

Let`s split this sentence into its basic parts: subject (the dream of space travel), predicate (became a reality).

Now let`s analyze predicate closely:

it consists of a verb (linking verb) and a noun that modifies and explains it.

Since it`s a noun, the correct answer is a predicative nominative.

Of course, if the adjective was next to the predicate, the answer would be a predicate adjective.

rudy is the nazi ideal, unfortunately for the nazis his ideal comes in the form of jesse the complete opposite of those who embrace the idea of white supremacy. over the course of the novel, rudy learns that he wants nothing to do with the hitler youth, and because of this his parents are forced to make a bargain; rudy's father is forced into the military, so that his son can remain home.   both liesel and hans influence that young man that rudy becomes. following han's example, rudy puts aside his own hunger to risk his life so that the jewish prisoners might have bread to eat.

a, a knight