Final Answer:
The incomplete idea in the passage is: "If building a portfolio becomes too costly."
Step-by-step explanation:
In the passage, the incomplete idea is evident in the statement "If building a portfolio becomes too costly." This sentence raises a condition but fails to offer a resolution or further guidance. A complete idea would typically include a subsequent clause indicating what action to take if the cost becomes prohibitive. Without this follow-up, the reader is left without a clear course of action or understanding of the author's intention.
To enhance the completeness of the idea, the author could elaborate on potential solutions or alternatives if cost becomes a limiting factor in portfolio building. This might involve suggesting specific ways to reduce expenses, exploring alternative methods for creating a portfolio, or providing advice on prioritizing certain elements over others based on budget constraints. By doing so, the author would offer a more comprehensive and actionable piece of advice to the reader, ensuring that the information is not only informative but also practically useful in real-world situations. In effective writing, providing a full and well-rounded idea helps readers grasp the intended message and facilitates a smoother flow of information.