It is the third one this is simple
1)Left to right in a period it goes up by one
2) the number valence electrons are the same from top to bottom
Pretty sure ur answer would be water and energy
A. Fewer valence electrons
Valence electrons are electrons that are held most loosely in the outermost shell.
Answer:- B) Full ionic equation
Explanations:- A molecular equation does not have ions. It is the non charge form of the elements of compounds. When we write the full or total ionic equation for the molecular equation then ions are written for the aqueous species. The ions present on both sides(reactant and product sides) in a full ionic equation are known as spectator ions or common ions. These ions are canceled to get the net ionic equation. For example, reaction of aqueous solution of silver nitrate with aqueous solution of barium chloride to form aqueous solution of barium nitrate and a precipitate of silver chloride.
Balanced molecular equation:-

Full ionic equation:-

If we look at the above full ionic equation then barium ion and nitrate ions are the spectator ions are they are present on both sides.
So, while writing the net ionic equation, these spectator ions are canceled.
Net ionic equation:-

So, it is also clear from the above example that it's the full ionic equation that include spectator ions.