Answer:
The excerpt from J. B. Jones’ diary is written in a formal style.
Explanation:
The author uses a serious and dignified tone to express his thoughts and feelings about the end of his diary. He acknowledges the significance of the moment and the impact it will have on him. The author’s use of words such as “discontinued” and “sufficient employment” further emphasizes the formality of his writing style. The author’s tone is not sarcastic or lighthearted, but rather reflective and contemplative.