Final answer:
The later entry of the central theme is called theme development. It refers to the progression and expansion of the main idea throughout a work of literature.
Step-by-step explanation:
The later entry of the central theme is called theme development. It refers to the progression and expansion of the main idea throughout a work of literature. Theme development can involve the introduction of new elements, the exploration of different aspects of the theme, and the deepening of the message or lesson conveyed by the theme.