1) Gravity
2) Wind
3) Glaciers
4) Surface water
5) Water
The circulation of water is called the water cycle
There won’t be most likely. Many glaciers are already melting at a fast pace already. They aren’t being formed either just melting. They’re shrinking significantly and will probably be gone soon because of climate change. Even glaciers that have been around for millions of years a melting away. :(
In order for the Earth to get larger, more mass would have to be added. Since no new mass is added in the process, It's size doesn't increase.
The closest planet to the sun would be Venus.