Final answer:
The most effective research question for Cameron's goal is option C, which asks how a collaboration between schools and nature centers can improve access to nature for children in Benton Harbor.
Step-by-step explanation:
The most effective research question based on Cameron's goal would be Option C: 'How can a collaboration between schools and nature centers improve access to nature for children in Benton Harbor?'
This research question directly aligns with Cameron's goal of increasing access to nature in his community. By focusing on the collaboration between schools and nature centers, the question acknowledges the role that educational institutions can play in providing opportunities for children to engage with nature. Additionally, it addresses the specific issue of improving access to nature for children in Benton Harbor.