Question

Do houses use parallels or series circuits

Answer 1

Parallel Connection is used . This is because the voltage drop would be negligible , and u can access any equipment . If series was used then the whole circuit would be needed to complete . So you have to switch on all the appliances to access one. In series the voltage drop is also considerable.

Answer 2

Every electrical outlet in your house, and every device or appliance that's
plugged into an outlet, are all in parallel.  It's also most likely that all of yours
are in parallel with all the outlets, devices, and appliances in the homes or
apartments of a few of your neighbors.

The only things in your home that are connected in series are the switches
that turn things on and off.