Answer :
'Building a trail for safe walking and biking opportunities' is an example of a change made at the individual level of the social-ecological model. It is an eco-friendly development strategy.
Building a trail for walking and biking can help to protect the surrounding natural environments and their natural resources.
It is a natural environment trial strategy that has the potential to reduce air pollution and greenhouse gases associated with global warming because people can use this trail for walking or biking rather than driving.
A sustainable eco-friendly trial can also be used for social recreational purposes with a minimal impact on the surrounding ecosystem.
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