Final answer:
The best phrase to show the connection between the two underlined sentences in a student's letter to the editor concerning park upgrades is 'As an example.' This selection connects a broad claim to a specific instance, thereby reinforcing the argument with clear evidence.
Step-by-step explanation:
To enhance the clarity of connections among claims, reasons, and evidence in the student's letter, a phrase that would best illustrate the connection between the two underlined sentences is A. As an example. This transition phrase effectively introduces concrete support to the claim that the picnic tables need replacing more than the swings, providing a specific instance of the tables' poor condition which bolsters the reason given for their replacement. The use of this transition thereby strengthens the argument by grounding it in observable evidential example.
It's important to be consistent with evidence to maintain a clear, logical flow in writing, whether that be in a school assignment, a letter to an editor, or any argumentative text. Every claim made should be matched with appropriate evidence within the same section to avoid confusing the reader. Advanced writing techniques include the use of transitions to smoothly guide the reader through the text, ensuring that the organization of claims and evidence is tidy and ordered.