What is the scientific saying/principle that explains why a hammer and a screwdriver, both made of steel, are used for different tasks?

Following the american gauge wire standards ,the larger gauge number, the slimmer the wire and thus the smaller current carrying capacity it can have.then both statements would be incorrect, as they are saying the opposite of what it is actually is.(smaller gauge numbers have thicker wires and can carry more current)

B   their speed changed during the 25 minutes.

What are the answer choices? would love to : )

The one with the most coils of wire around the iron core.