Summarize the assignment.

I am having a hard time understanding where to start with this assignment. I'm supposed to use descriptive language to show rather than tell the attributes of the world. In a sketch of one story's world, I'm supposed to identify and describe the following:

• Inhabitants of the chosen world (such as cultural, racial, or ethnic groups; animal, botanical, or non-human inhabitants; previous or extinct inhabitants; relationships among the inhabitants, etc.)
• Physical and non-physical landscapes that exist in the chosen world (such as ecosystems, proximity to other worlds, atmosphere, terrain, urban and rural areas, buildings and infrastructure, as well as how the world looks, sounds, smells, tastes, and feels to inhabitants, etc.)
• Major points of interest in the chosen world (such as cities, historical landmarks, geological features, popular establishments, etc.)
• Important historical events that have occurred in the chosen world (such as notable leaders and forms of governments; important world, environmental, or religious events; notable disasters (natural or inhabitant-made), etc.)
• Major conflicts that currently exist in the chosen world (such as between or within groups of inhabitants, against other worlds, etc.)