If someone is getting treatment for drug abuse, what can him stay on track

What is the name of the device that senses the current flowing,tripping the circut,and cutting off the electricity

Iwill mark you brainlest if you answer this question

What is the function of reverse transcriptase in retroviruses? a) it uses viral rna as a template for dna synthesis.b) it converts host cell rna into viral dna.c) it translates viral rna into proteins.d) it uses viral rna as a template for making complementary rna strands.