if there is a + a and a - charge near each other and they are moved farther apart work must be done, and the result is storing electric potential energy. What would be a good analogy to this process in the case of gravity?

Two models of the same compound are shown. in what way is model b better than model a? model b shows the types of elements in the compound, but model a does not. model b shows the three-dimensional shape of the molecule, but model a does not. model b shows how the atoms in the molecule are connected, but model a does not. model b shows the number of atoms of each element in the molecule, but model a does not