Explain how the following metals are obtained from their compounds by the reduction process?

Metal $\mathrm{Z}$  which is high up in the reactivity series.

Which one of $\mathrm{Cu}, \mathrm{Zn}, \mathrm{Al} \mathrm{and} \mathrm{Fe}$ will satisfy the following? Answer with justification.

(a) One of its ores is rich in ${\mathrm{M}}_2{\mathrm{O}}_3$.

(b) ${\mathrm{M}}_2{\mathrm{O}}_3$ is not affected by water.

(c) $\text{'}\mathrm{M}\text{'}$ forms two chlorides ${\mathrm{MCl}}_2$ and ${\mathrm{MCl}}_3$.