What connection does the author draw between the rotation of galaxy clusters and dark matter?

What are the adjectives in this sentence? our ancient car has became very unreliable recently,so we are trying to find a cheap replacement .

What kind of word is the pronoun in bold letters? the car will be yours when you pay your last car payment.

What is dialogue? a. conversations that takes place between characters b. directions left by the playwright on a script c. instructions that indicate actors' stage positions d. the props that represent a play's physical location