(a) Describe and explain with sketches the process of longshore drift. Describe what happens to a beach when a wall is built that obstructs the longshore drift.

(b) Describe the factors that affect whether sediment is eroded, transported or deposited by flowing water and explain how each factor influences erosion, transport and deposition processes.

(c) The most geologically active areas of the earth's surface are tectonic plate boundaries. Describe 'boundary hazards' occurring in these areas and explain how geological processes in these areas may affect engineering projects.

(d) Distinguish between the process of erosion and the process of weathering, explain factors that influence the rate of weathering and erosion, describe examples of these processes and explain the role played by weathering and erosion in the 'rock cycle'.