Answer:
A summary should explain the ideas in the theme.
Step-by-step explanation:
A summary can be defined as a shortened text that typically highlights the main point and characteristics of an article, story or write-up.
Basically, a summary is used to provide an overview, defining factors and key elements in a story or write-up.
A theme in literature can be defined as the underlying meaning, salient abstract point or main idea of a story, article or write-up that are stated directly or indirectly depending on the writer.
In English literature, a summary is used by a writer to explain the underlying meaning or main ideas that he or she intends to convey to the audience.
Hence, a summary should explain the ideas in the theme.