Step 1: Identify the verb in the sentence
\[\begin{array}{rl} \bullet & \text{The main verb in the sentence is "is".} \\ \bullet & \text{The phrase "to grow" appears after the word "free" and is in its base form.} \\ \end{array}\]
Step 2: Confirm if "to grow" is an infinitive
\[\begin{array}{rl} \bullet & \text{Since "to grow" consists of "to" + "grow" (the base form of the verb), it is an infinitive.} \\ \bullet & \text{It functions as an adverb, modifying "free" by explaining the purpose of freedom.} \\ \end{array}\]
Final Answer: The infinitive in the sentence is "to grow".
Write the collocations for the following:
(a) ticket \(\underline{\hspace{3cm}}\)
(b) \(\underline{\hspace{3cm}}\) drizzle.