Which question is best in line with the physicist's approach to inquiry discussed?

The selected question aligns well with the physicist's approach to inquiry as it seeks a specific and measurable answer related to the principles of physics. The inquiry into the speed at which stones of a particular size fall suggests an interest in understanding physical laws and the effects of gravity, allowing for experimentation and quantitative analysis.

This question can be investigated through controlled observations and data collection, embodying the scientific method where hypotheses can be formed and tested. In contrast, other options, while they may pertain to important subjects, do not lend themselves as readily to the empirical methods or quantitative measurements associated with physics. Queries regarding environmental destruction or human happiness often delve into more complex socio-political or psychological dimensions, which may not yield straightforward, quantifiable answers. Meanwhile, the size of a meteorite involves observational data but doesn't directly invite inquiries into the underlying physical principles governing its behavior, hence making the inquiry into the fall of stones more representative of the physicist’s approach.