Final answer:
The difference between a topic and a subject is that option a. a topic is a narrow aspect of a subject. Topics focus on specific elements suitable for in-depth discussion within broader subjects that encompass overall themes or ideas.
Step-by-step explanation:
The difference between a topic and a subject is that a topic is a narrow aspect of a subject, whereas a subject is a broad area of knowledge. A topic is what you are specifically discussing or researching within that broader subject. For example, in the subject of literature, a topic could be the analysis of a particular theme within a novel.
When you consider the subject of a literary text, you're looking at what the text is as a whole - its plot, its major themes, the essential image it conveys. In contrast, a topic delves into a specific element of that subject, often with a focus that invites debate, analysis, or discussion, such as examining the role of a specific character within a novel.
Finding a topic can be like an adventure, exploring an angle within a subject that piques your interest and can be analyzed significantly to provide nuanced insights.