What is the meaning of the idiom" part and parcel"?

an essential part to courier something in different parts to divide something divide and rule

an essential part

The idiom "part and parcel" means an essential part. It is used to emphasize that something is an integral part of something else. For example, you might say that "traveling is part and parcel of my job" to mean that it is a necessary part of my job that I cannot avoid. The other options are incorrect.