for the work of the sea and the ice do we only have to know one ? is it always a choice question? And good luck to everyone doing exams :)
If either is involved, they are NEVER asked on their own. Some schools study Glaciation, some study the work of the sea - which I did. However, it will ask you specifically on the exam: "With the aid of a labelled diagram, explain an example of a coastal / glacial deposition landform" or "erosion". Make sure you have one erosion landform studied and one deposition landform studied.