All of the responses provided offer valid insights into how genre can affect the theme of a text, but one stands out as particularly comprehensive:
Genre affects which themes can be presented in the story.
This response highlights that different genres often have conventions and expectations that shape the types of themes that are explored. For example, a romance genre will likely focus on themes of love and relationships, while a horror genre might delve into themes of fear and survival. Each genre has its own thematic possibilities, which can influence the author's choices in developing the narrative.