Respuesta :
I think you forgot to give the choices along with the question. I am answering the question based on my knowledge and research. You would increase mechanical advantage by making the blade longer from the cutting edge. I hope that this is the answer that has actually come to your desired help.
Answer: make a longer wood for the ax
Explanation: torque is the Force that acts on a moment arm, and is used to cause rotational motion.
The motion of the ax is in a rotational form
So using the formula for torque = force ×lenght
We find out that the more the length the more the torque
This increase in length will make the wood splitting easier