Hydrogen bonds connecting base pairs must be broken.
The correct answer is differentiation.
Planetary differentiation can be defined as a process in which separation of different constituents of the planetary body takes place.They are separated based on their physical or chemical behavior, where the body divides into different layers: the less denser materials rise up to the surface and the more denser substance of the planet sinks.
Example: dwarf planets.
The atmosphere, it holds all air on earth and keeps life livable by protecting use from the suns rays. The answer is atmosphere. :)
