Answer:
A: Helium or Hydrogen
Explanation:
Terrestrial planets are the 4 inner most planets of the solar system which are mercury, venus, earth, Mars, while the giant planets are the 4 outer most which are Jupiter, Saturn, Uranus and Neptune.
Now, these outer most ones are the surface ones and are surrounded primarily by layers of hydrogen and helium gases.
No more solute will dissolve at that temperature, the temperature would have to be increased in order for more solute to dissolve.
Because the birds that fly overseas carry different flu viruses every year.
