Acceleration can be described as changes in speed, changes in direction, or changes in both. Acceleration is a vector.
Melamine should be the right answer, i hope this helps.
Answer:
In a voltaic cell (one that happens spontaneously), electrons flow from a negative electrode to a positive electrode (anode cathode). The reaction that happens is a redox reaction where the anode is oxidized (goes from a solid to an ion) and the cathode is reduced (going from an ion to a solid).
Explanation: