Answer:A raven is one of several larger-bodied species of the genus Corvus. These species do not form a single taxonomic group within the genus.
There is no consistent distinction between "crows" and "ravens", and these appellations have been assigned to different species chiefly on the basis of their size, crows generally being smaller than ravens.
I believe that peer is referring to someone else who goes over your paper or report and then puts checks next to things you need to work on or that you have done.
