The correct answer is 18 inches from the curb.
Please arrive early for us so that we can start meeting on time.
False, An expository essay is written to explain something, or to prove/support a point not to give an audience a fabricated story.
The correct answer is Very young owls grow slowly.
Here, the adverb is <em>very </em>and the adjective is <em>young, </em>so the adverb is used to modify the adjective, or to show a particular degree of the adjective (how young? very young.).
In the rest of the options, there is only one adverb <em>slowly, </em>and it's not modifying an adjective, but rather the verb.