Respuesta :
I and III are characteristics of atoms and molecules in the gaseous state.
Hence, option D is correct.
What is an atom?
An atom is any particle of matter which contains at least one proton.
The gas expands as the temperature increases and has high densities.
The temperature of a gas will increase and the density will decrease as it
expands.
The expansion of gas occurs as a result of an increase in the elastic
collision of the atoms.
This is a result of the increase in temperature which causes the atoms to be more spatially arranged.
The density of gas also reduces as a result of the same number of gas
molecules occupying more volume.
Learn more about atom here:
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