Resistance is the opposition to electron flow in the wire. The opposition results in heat generated in the material of the resistor. The flow of electrons in the wire is reduced. It is common in DC current and AC current. Components are usually resistors.
Reactance is the opposition to electron flow however there is no dissipation of energy but conservation which results in delay of electron flow. It is common in AC current. Components are usually capacitors and inductors.
Impedance is a sum of resistance and reactance. When you have a circuit with impedance it means that it has resistance and reactance. Therefore the circuit has resistor components and capacitive and/or inductive components. Note that diodes, transistors and myriad of other components have some reactive, resistive or impedance behaviour.