Density is the answer
Answer:
Gravitational force
Explanation:
Gravitational force is a fundamental force with a very long-range.
This force is a relatively weak type of fundamental force of attraction that acts between all particles that have mass.
There is a school of thought that believe that its pull is mediated by gravitons.
―FALSE
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c. Boundary where air masses meet and cold air rises above warm air.
c. liquid
because the are not very close if the said very closely packed together it would have been a solid