It's similar in the sense that when an ecosystem is challenged above its initial capacity, so can roads be challenged over their carrying capacity. When this happens, an ecosystem/roads "break down" start worsening the function they were supposed to do and in general become worse and worse.
Our bones support us and allow us to move. Muscles pull on the joints, allowing us to move. Our bones help hold our bodies in place. They need eachtoher. The muscles need the bones for stability.
