The infinitive here is 'to leave', and it is used as an 'adverb', meaning 'with the intention to leave', since it modifies a verb, it has to be an adverb.
A) hope this is correct and helps
<u>Answer:</u>
“It took us an hour to paddle over to the other side of the lake and back” uses a transitional word that best indicates a shift from one timeframe to another.
<u>Explanation:</u>
Transitional word is a connector which connects two separate sentences into one. In the given example, the sentence exactly conveys a meaning that it took one hour to paddle from one side to other and vice versa. Mostly transition words are conjunctions that combines words, phrases or clauses. These transition words can be used within a single sentence. They can also used to combine two different sentences or even paragraphs.
