All of the following show density and buoyancy except
a. a boulder resting at the bottom of the ocean.

b. the ammount of hot soup contained in a bowl.

c. ice cubes floating in a glass of iced tea.

d. a hot air balloon moving through the air.

I think the correct answer from the choices listed above is option B. The amount of hot soup contained in a bowl does not show density and buoyancy. The other choices shows these things since it shows the that due to differences of such values for each object, one object floats or sinks.

Confused on question what should we be answering