Yes it can.
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Answer:
A and B.
Explanation:
Answer C is wrong - there are no tall trees underwater
Answer D is wrong, there are mountain chains underwater due to plate tectonics.
Answer:
It helps melt the ice away on their walkway.
Explanation:
The salt makes the ice to freeze at a lower temperature. So when a solute (salt) comes into contact with the ice the freezing point is lowered.
The mass of a star causes gravitational pull inwards. The fusion of hydrogen to helium create temperature and pressure which pushes outwards, so basically the forces of gravity and pressure. Possibly nuclear fusion.