Yo voy a comerla. This is the correct response since "yo" is I. The correct verb for "yo" would be comerlo or comerla since the object "la pizza" is feminine your verb has to be feminine as well so you use "comerla". Notice the "la" before pizza and the -la after comer.
The bullfighting tradition started in the Medieval time in Spain.<span> The first bullfight,took place in Vera, Logroño, in 1133, for the coronation of the king Alfonso VIII.</span>