A.I. Explanation:

Option 1: "talking"

Explanation: The option 'talking' does not fit the context of the text. The text discusses Cirtius's transition to creating waxworks of actual people, which implies a focus on visual art rather than verbal communication. Therefore, 'talking' is irrelevant to the main idea.

Option 2: "sculpture"

Explanation: While 'sculpture' relates to the art of creating three-dimensional forms, it does not accurately reflect the specific context of waxworks mentioned in the text. The text emphasizes waxworks of actual people rather than traditional sculpture, making this option incorrect.

Option 3: "interest"

Explanation: The word 'interest' fits perfectly in the context as it suggests that Cirtius began to see more engagement or fascination from the public after he switched to creating waxworks of actual people. This aligns with the text's theme of increased success and recognition.

Option 4: "works"

Explanation: The option 'works' is too vague and does not specifically convey the idea of increased public engagement or fascination. While it could relate to Cirtius's creations, it lacks the specificity needed to complete the sentence meaningfully in the context of the text.