Rudolph likes to skydive as a hobby. though he is careful when he skydives, why is his life insurance premium likely higher than sandy, who jogs as a hobby?

Because skydiving is more of risk to Rudolph life, meaning if something happens the life insurance would pay for anything that would happen to him.

its like car insurance. a jeep costs more because it can flip easy, and its meant to go anywhere and is more likely to get banged up in the mountains, ect