I guess formal and informal refer to two types of essay - you can write a formal essay where you avoid conversational language and such and where you need to be very professional, or you can write informally where you don't have to think about such things, it is very casual.
Answer:
As the father of the gods has so decreed that Persephone must yield to Hades, there is nothing that Demeter can do about it. Persephone has learned the hard way that the will of Zeus must always be obeyed, irrespective of the terrible consequences that sometimes follow.
Explanation:
Answer: B she should consult reliable sources of information
Explanation: because i just answered it on edg