Why are alloys commonly used in electrical heating devices? 

The idea behind this query is that alloys often have high resistivity and high melting points. This increases the use of alloys in heating appliances. This strategy will assist in obtaining the correct response to this issue statement.
As opposed to pure metals, alloys have a higher resistivity and melting point.
Thus, at greater temperatures, alloys cannot readily burn or oxidise.
We now utilise alloys in heating equipment because we seek greater temperatures from those devices.
Nichrome, for instance, is an alloy of nickel and chromium.
Nichrome is an example of an alloy that is often tougher than pure metal.
They are not homogeneous in size; rather, they are composed of atoms of various sizes.

As a result, the layers of atoms cannot simply glide over one another, making the alloy as a whole far stronger than any of the pure metals it includes individually.
Benefits of alloys:
(i) Improve the tensile strength 
(ii) Improve corrosion resistance 
(iii) Increase the metal's toughness.
(iv) Change the colour
(v) Offer enhanced casting abilities.
So, this is the appropriate response.

Hence, the correct answer is option A.