The given question asks to identify the region shaded in $(C \cup A) \cap B$ on the Venn diagram.

To break this down:

1. $C \cup A$: This represents the union of sets $C$ and $A$. This includes all regions that belong to either $C$ or $A$ or both. From the Venn diagram, this includes regions: I, II, IV, V, VI, VII.

2. $B$: This represents all the regions that belong to set $B$. From the diagram, the regions in $B$ are: II, III, V, VI.

3. Intersection $(C \cup A) \cap B$: This represents the overlap between $C \cup A$ and $B$, which means we are looking for the regions that are common to both sets. These common regions are: II, V, VI.

Thus, the regions shaded in $(C \cup A) \cap B$ are II, V, and VI.

Do you need further details or clarifications on this?

Here are five related questions to deepen your understanding:

1. What does $A \cap B$ represent in a Venn diagram?
2. How would the regions change if we asked for $C \cap B$?
3. What is the union $A \cup B \cup C$ in the diagram?
4. Can you identify the region representing $A \setminus B$?
5. How would $(A \cup B) \setminus C$ be represented?

Tip: The union of sets includes all elements from both sets, while the intersection includes only the elements common to both sets.