Answer:
A prepositional phrase is a part of a sentence that consists of one preposition and the object it affects. The object of a prepositional phrase can be either a noun, gerund, or clause.
Explanation:
<h3>Which number is Main Idea? </h3>
Answer: Main idea (1) Storage facilities have become part of our culture.
Explanation: The other statements are examples to support the main idea.
Since the sentences are not provided in this question a probable answer will serve to address. "Initiation" is defined as the start or the beginning of something, a commencement of a certain action/behavior. Moreover, initiation here could mean of something that will assess the ability or capacity of the individual before becoming a member of a peer group or certain community.