Answer:
You are right,
In the sentence, When the house was being built , an <u>electrician</u><em> </em>installed the wiring that would provide light and power.
Electrician is the noun whose meaning is given in first option.
Paint + et = painter - someone who paints
kind + ness = kindness - someone who is kind
invent + or = inventor - someone who invents
great + ness = greatness - something to be achieved, by a leader or a country (for example)
A. topic~~~~~~~~~~~~~~~~~
this question doesnt belong here
