Answer:
1. This theory best accounts for the objects we currently find in the Solar System and the distribution of these objects. The Nebular Theory would have started with a cloud of gas and dust, most likely left over from a previous supernova. The nebula started to collapse and condense; this collapsing process continued for some time. The Sun-to-be collected most of the mass in the nebula’s center, forming a Protostar.
2. — mountains
— hills
— valleys
— plateaus
— plains
3. Rotation refers to an object's spinning motion about its own axis, while Revolution refers the object's orbital motion around another object.
Explanation:
here's the example of rotation and revolution (nasa pic)
