A ride on someone else's back or shoulders

Answer: Option B

One word substitute is Piggyback.

Hunchback: a back deformed by a sharp forward angle, forming a hump, typically caused by collapse of a vertebra.
Piggyback: a ride on someone's back and shoulders.
Kickback: a sudden forceful recoil.
Cuddle: hold close in one's arms as a way of showing love or affection.