A:The difference is potential a anode requires a positive potential and the cathode requires a negative potential
ANSWER : I wander what a zener will behave with this explanation. Both have cathode and anode terminals
To be forward biased any diode (e.g. vacuum tube, crystal, junction, point contact) must have its relative anode voltage more positive than its cathode voltage. If the absolute anode voltage is negative but the cathode voltage is even more negative, then the diode will be forward biased. But as your question made no mention at all of the cathode, I cannot tell if this is the case or not.
If this is for your Penn-foster test i can tell you one thing is that the the answer isn't "accelerated toward the anode".
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please tell me the difference between thickness
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no but you can tell the difference by taste
tell me the answer
tell me
tell me