Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to write a nonfiction book [title] Understand the genre. [step] Nonfiction writing is literature based on fact. Nonfiction writers can focus on topics like biography, business, cooking, health and fitness, pets, crafts, home decorating, travel, religions, art, history, etc.

Ending1: [substeps] Take stock of the genre and their implications to ensure that you have clear content that is actually intended to entertain others, least of all readers. For example, a nonfiction one-on-one adult might be more likely to enjoy the novels of one of the world's most popular authors. Ending2: The list of possible subjects for nonfiction writing could be anything and everything. [substeps] Unlike fiction, which is literature created from imagination, nonfiction is structured around real events, moments, practices, and approaches to a subject. Ending3: At the same time, nonfiction writers must focus on other interests as well. [substeps] Invent and experiment to make your works interesting and engaging. Ending4: Think of a few genres of writing that are most fascinating to you and pick out a few that interest you the most. [substeps] Genres like fiction and nonfiction can help you spark your interest.

Answer format: ending1/ending2/ending3/ending4