Final answer:
d) 8:1. The best performance is represented by the weight-to-power ratio of 8:1.
Step-by-step explanation:
The weight-to-power ratio represents the performance of a vehicle or engine. A lower weight-to-power ratio typically indicates better performance as it means that the same amount of power is being used to move a lighter object. Comparing the given ratios, the one with the lowest value would represent the best performance. Therefore, the answer is d) 8:1. This ratio indicates that the weight of the object is 8 times greater than the power being generated.