The momentum of an object is calculated using the formula:
\[ \text{Momentum} = \text{mass} \times \text{velocity} \]
In this case, the mass of the dog is 18 kg and its velocity is 0.63 m/s.
Calculating the momentum:
\[ \text{Momentum} = 18 , \text{kg} \times 0.63 , \text{m/s} = 11.34 , \text{kg} \cdot \text{m/s} \]
So, the correct response is:
11.34 kg*m/s