19. in which of the following sentences is the word down used as an adverb?

a. just as she was standing to give her presentation, ashlee fell down.b. the ball moved down the street towards the intersection.c. ricky rolled down the car window to place his order at the coffee shop.d. gail fell down the steps because she tripped on her untied shoelace.

C. is the correct use of "down" as an adverb. "Ricky rolled 'down' the car window to place his order at the coffee shop." Because "down" is used to signify the lowering of an object from an higher position, it is an adverb (adverbs describe verbs). The other options to not require "down" in the sentence in order to make sense. For them, it is a general direction and not part of the verb.

Fear prevents individuals from reaching their full potential and acceptance from loved ones helps people overcome fear.