Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal?

Explanation

The coils of electrical heating devices such as electric toasters and electric frons are made of an alloy, e.g. Nichrome rather than a pure metal because :
(1) the resistivity of an alloy e.g., Nichrome is much higher than that of its constituent metals.
(2) alloys do not oxidise (i.e., burn) readily at high temperature (i.e., when it is red hot at `800^@C`)
(3) alloy has a high melting point.