Geo coursework Coasts

hi guys, im a bit stuck on what to write for my intro and methodology? its just not clicking in my mind and its quite annoying.
exam board - Edexcel - a level geo

title question - To what extent does geological structure affect the development of coastal landforms along the Purbeck Coast?

Hypothesis
1.The degree of consolidation determines differential rates of erosion.
2.Concordant and discordant coastlines have an impact on the resultant landforms.

any help would be much apreciated