Kirchhoff's voltage law and current law are based (respectively) on the conservation of

Kirchhoff's voltage law states that the algebraic sum of potential differences around any closed loop equals zero, which follows directly from the conservation of energy since the net work done on a charge moving around a closed path must be zero.

Kirchhoff's current law states that the algebraic sum of currents at any junction equals zero, reflecting conservation of charge as no net charge accumulates at a node.

Comparing with the options:

B) energy, charge — Correct correspondence

The final answer is $\boxed{B}$.