Final answer:
Ron can get to sea level by descending 10 feet through walking, climbing down, or any method that reduces his elevation by that measure.
Step-by-step explanation:
To get from 10 feet above sea level to sea level, Ron would need to move downward until he reaches the point where the elevation is 0 feet, which is considered sea level. This can be achieved by Ron walking or climbing down a hill, stepping off a platform, or any other means of descent that lowers his elevation by 10 feet to reach sea level.