Use examples from the novel to justify your opinions about how each theme is explored and portrayed by the author.

As an AI, I don't have the ability to read or analyze novels. However, I can guide you on how to approach this task.

1. Identify the Themes: The first step is to identify the themes in the novel. Themes are the fundamental and often universal ideas explored in a literary work. They could be about love, friendship, death, betrayal, power, corruption, etc.

2. Find Examples: Once you've identified the themes, find examples in the novel that represent these themes. These could be events, dialogues, or character actions that reflect the theme.

3. Analyze the Examples: Analyze how these examples explore and portray the theme. Consider how the author uses these examples to convey a message or make a statement about the theme.

4. Formulate Your Opinion: Based on your analysis, formulate your opinion on how effectively the author has explored and portrayed the theme.

For example, if we take the novel "To Kill a Mockingbird" by Harper Lee, one of the main themes is racial injustice. This theme is explored through the trial of Tom Robinson, a black man wrongly accused of raping a white woman. The author portrays this theme by showing the prejudice and bias in the court proceedings, and through the characters' reactions to the verdict. In my opinion, Harper Lee effectively explores and portrays racial injustice by presenting it in a way that is easy to understand and emotionally engaging, making the reader reflect on the issue.