Galvanic (Voltaic) and Electrolytic Cells Practice Test

A student sets up two half-cells connected by a salt bridge and a wire: Fe(s) in FeSO$_4$(aq) and Ag(s) in AgNO$_3$(aq). The student measures a steady voltage with a voltmeter (no battery attached). When the wire is connected through a small motor, the motor turns briefly and the Ag electrode increases in mass. Which statement correctly classifies the process and identifies a defining feature?

A corrosion scientist demonstrates a simple cell by placing an iron nail and a copper strip into a saltwater-soaked paper towel so they are electrically connected through a wire. A small voltage is detected and the iron shows signs of oxidation over time without any external power source. Which statement correctly classifies the process and its defining feature?