Final answer:
According to the given information, the final speed of the lion-gazelle system just after the lion attacks cannot be determined without knowing the lion's acceleration.
Step-by-step explanation:
Lions can run at speeds up to approximately 80.0 km/h. However, the question is asking for the final speed of the lion-gazelle system just after the lion attacks, so we need to consider the lion's acceleration to catch the gazelle.
Unfortunately, the given information does not provide any specific values for the lion's acceleration. Without the acceleration, it is not possible to calculate the final speed of the lion-gazelle system accurately. Therefore, we cannot determine which given option (1) 80.0 km/h, (2) 107 km/h, (3) 36.0 km/h, or (4) 75.5 km/h is correct.