To effectively develop the key concept about the benefits of recycling, an author would most effectively use the following approach:
By providing information on the environmental impacts of recycling.
This method directly addresses the core idea of how recycling contributes positively to the environment, such as reducing waste, conserving natural resources, and minimizing pollution. By detailing these impacts, the author can illustrate the tangible benefits of recycling, making the concept more relatable and persuasive for the reader.
The other options, such as detailing neighborhood recycling practices or instructing readers to research their community, may provide context but do not emphasize the direct benefits of recycling itself. Additionally, a chart on materials that get recycled is informative but does not convey the broader benefits of the practice.
Focusing on the environmental impacts aligns with the purpose of developing a strong key concept about the importance and benefits of recycling.