Please briefly explain the difference between these terms:
Electric current, Electric circuit, Electric charge, Electric conductor and The flow of Electrons.

Dear student,
We assume your question is about to define the terms; instead of stating the differences;

Electric current:

Electrical current is a measure of the amount of electrical charge transferred per unit time. It represents the flow of electrons through a conductive material. 

Current is a scalar quantity (though in circuit analysis, the direction of current is relevant). 
I= Q/t where, I= Current,  Q= charge,  t= time

The SI unit of electrical current is the ampere, defined as 1 coulomb/second.

Electric circuit:
An electric circuit is a pathway that provides a path for the electricity to pass from the positive terminal to the negative terminal of the cell.

Electric charge:
Electric charge is a property of some elementary particles that gives rise to an electrical interaction between the charges.
Electric charges come in two types
1.  Positive charge (charge of proton)
2.  Negative charge (charge of electron)

Electric conductor:
Electricity can pass easily through some certain materials. These materials are known as electrical conductors; those have free electrons that assist the electrical current to flow through it. For example: aluminium, copper, iron, and steel are good conductors of electricity.

Flow of electrons:
Rate of flow of electrons is known as electric current. As we know, electric current is nothing but the charge flow per unit time.

Regards,

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