With the help of examples,describe the classification of essential elements based on the function they perform.

(N/A) $(1)$ Major constituent elements: Essential elements that act as components of biomolecules and are structural elements of the cell. For example,$C$,$H$,and $O$ are major constituent elements found in the composition of carbohydrates and are also present in the cell wall.
$(2)$ Cell membrane and plasma-based elements: $N$,$P$,and $S$ are constituent elements of the cell membrane and plasma. These form the plasma along with $C$,$H$,and $O$.
$(3)$ Elements for enzyme activity: Some enzymes do not function without the presence of mineral elements. For example,$RuBisCO$ functions in the presence of $Mg^{2+}$,and the presence of $Mg^{2+}$ is also necessary for $PEP$ carboxylase.
$(4)$ Elements for osmotic potential maintenance: Potassium $(K^{+})$ plays an important role in the opening and closing of stomata.
$(5)$ Elements for ionic balance: They help in maintaining the ionic balance or equilibrium of the cell,for example,$Ca^{2+}$,$Mg^{2+}$,and $K^{+}$.