Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to create a fictional universe [title] Consider the scope of the universe. [step] One of the first elements of the universe you should focus on is the scope of the universe, or how much physical space the universe takes up in a larger world. Consider how big you want your universe to be.

Ending1: You may want to have a universe as big as the size of a football field or as small as the size of one planet. But the possibilities do not exist in greater dimensions-because there are so many aliens and they are all small organisms. Ending2: It might help to think about what you want your fictional universe to hold and how large it is compared to other universes or worlds. [substeps] Maybe the universe is the larger world, as far as your characters know, and there are several planets or lands within the universe. Ending3: Modular is a somewhat larger universe that's characterized by multiple fixed space segments. For example, if you want to enter 3d space and the universe does not take up 2 galaxies, then you don't want a galaxy that's 2 kilometers (2 miles) or 1 mile (2 kilometers) or less. Ending4: [substeps] The diameter of the universe you select will determine how much space it takes up in a given space. Although it is not exact, some planets, like planet earth, develop the girth of a galaxy.

Answer format: ending1/ending2/ending3/ending4