Read the passage given below and answer the questions that follow, by selecting the correct/most appropriate options :

Which part of speech is the underlined word in the following sentence ?
Almost overnight new grass spring up.

The correct option is Adverb.

Step-by-Step Explanation:

1. Analyze the Given Sentence:
"Almost overnight new grass spring up."
Here, the word to be analyzed is "overnight" (or "Almost overnight").

2. Understand Parts of Speech:
- An adverb modifies a verb, an adjective, or another adverb by indicating time, manner, place, degree, or frequency.
- An adjective modifies a noun or pronoun.
- A preposition shows the relationship between a noun/pronoun and other words in a sentence.
- A pronoun takes the place of a noun.

3. Determine the Function of "overnight":
In this context, "overnight" answers the question "When did the new grass spring up?". Since it modifies the verb phrase "spring up" by specifying the time or duration in which the action took place, it functions as an adverb of time.

Therefore, the correct part of speech is Adverb.