Final answer:
The decrease in fuel efficiency due to an increase in vehicle speed from 55 mph to 65 mph generally falls between 15-30%. The mileage per gallon can be reduced by two to three in most cases, reflecting the physics concepts of energy efficiency and aerodynamics.
Step-by-step explanation:
The question posed appears to address the relationship between vehicle speed and fuel efficiency, specifically how speeding can affect the mileage per gallon your vehicle gets. It's known that as speed increases, fuel efficiency often decreases due to increased air resistance and engine load. This is a concept anchored in physics, particularly relating to energy efficiency and aerodynamics. Without specific data relating to a particular vehicle model, providing an exact figure for the reduction in mileage per gallon when going from 55 mph to 65 mph is challenging. However, it's commonly cited that fuel efficiency can decrease by as much as 15-30% as speed increases from 55 mph to 65 mph due to these factors.
Nonetheless, the specific choices provided in the question (one to four) suggest that the question is looking for a general estimation rather than an exact figure. Typically, driving at 65 mph rather than 55 mph can reduce mileage per gallon by two to three, depending on the vehicle's make, model, and efficiency. Therefore, given the provided options, the answer would either be 2 or 3. Since the question implies a singular increase (by a factor), the most fitting selection from the given options would be two or three.