You only have to select one form of SPECIATION to explain and demonstrate how it

You only have to select one form of SPECIATION to explain and demonstrate how it works. – So first, go over the various forms of speciation. Make sure you understand the steps involved in each.
Once again mutation which provides variation is at the heart of the process. Mutation is the engine that runs evolutionary change.
Make sure you explain how variation ( the product of mutation) is functioning in the process of speciation.
By this I mean, you must show that there is some variation prior to any other steps occurring. Once again showing the steps in the process is what is important here.
Include the terms reproductive isolation and gene flow and make sure you demonstrate that you know what they mean correctly.