Q: Fact: a switch is used to stop the flow of current in an electrical circuit
Question: A switch is used to stop the flow of currents which causes Joule heating in

A: electrical circuit.

Q: Fact: a mammal usually nurses its offspring
Question: A mammal usually nurses its what?

A: younglings

Q: Fact: shiny things reflect light
Question: What is least likely to absorb light?

A: foil

Q: Fact: a consumer can not produce its own food
Question: A consumer is unable to produce its own what?

A:
sustenance