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In particular, if we hypothesize that the intent was to ask about
buoyancy, this is not the right way to do it. The question embodies
wrong physics in the sense that the buoyancy is independent of
pressure /per se/, as you can see from the following: Make a plot
using density and pressure as the axes. (The contours of constant
temperature are hyperbolas on this plot.) On this plot, contours
of constant buoyancy are parallel to the contours of constant density
and perpendicular to the contours of constant pressure!
If we hypothesize that the intent was to check whether the students
can visualize the pressure as a scalar field and the pressure gradient
as a vector field ... well, let's just say that the level of the
question is inconsistent with the rest of the FCI.