Final answer:
The theme of the text is that developing individuality can cause a separation from people you care about, highlighting the complexity of maintaining friendships amidst personal growth and new interests in high school.
Step-by-step explanation:
To explain the theme of the text, we should consider the main idea or message based on the details provided. In this case, the story describes Scott and Jacob's transition into high school activities that reflect their personal interests, which has the unintended consequence of reducing the time they have to spend together. This indicates that the text is addressing the complexities of friendship and personal growth, suggesting that developing individuality may sometimes lead to a separation from people you care about, aligning with option B. The storyline demonstrates how both characters embrace their new pursuits, indicative of the challenges that come with growing up and finding one's own path.
While the author's purpose could include entertaining the reader (option C) and encouraging them to pursue their interests (option D), the central theme of this narrative upon the evolution of a friendship amidst personal development. Consequently, the theme is less about making new friends through hobbies or outright encouraging readers to join clubs, but about the complex relationship between friendship and personal growth.