An author might develop a key concept about the benefits of recycling by providing information on the environmental impacts of recycling. This approach allows the author to highlight the positive effects of recycling on the environment, such as reducing landfill waste, conserving natural resources, lowering greenhouse gas emissions, and promoting sustainability. By focusing on these aspects, the author can effectively convey the importance and advantages of recycling as a key concept.
The other options, while related to recycling, would not directly contribute to outlining the benefits. For example, instructing the reader to research recycling in their community is more about encouraging personal action rather than explaining benefits. Detailing which neighborhoods recycle would focus on data rather than benefits, and a chart of materials recycled provides information but lacks emphasis on the advantages.