The answer would be Estrogen, because that is a female sex hormone
The work done by the engine is converted into kinetic energy of the motorbike+rider system:

where
W=6400 J is the work
m=200 kg is the mass of the system
v is the speed acquired by the motorbike
Rearranging the equation and substituting the numbers in, we find
Running because kinetic energey is the engery created by motion