Answer: Speed.
Explanation :
It is given that if an object is said to be moving at 10 m/s due north. In this case, the velocity of an object is given. It has both magnitude and direction as well.
Velocity is a vector quantity. 10 m/s is the magnitude of velocity and it is moving towards the north direction.
We know that the sped of an object is the total distance covered divided by the total time is taken. It is a scalar quantity.
So, 10 m/s shows the speed of an object.