How is the inductive effect different from the resonance and electromeric effects?

(N/A) The inductive effect involves the permanent displacement of $\sigma$-electrons along a carbon chain due to the difference in electronegativity between atoms.
Similarly,the resonance effect is a permanent effect involving the delocalization of $\pi$-electrons or lone pairs within a conjugated system.
In contrast,the electromeric effect is a temporary effect that occurs only in the presence of an attacking reagent,involving the complete transfer of a shared pair of $\pi$-electrons to one of the atoms joined by a multiple bond.