Notice that that specific examples is mentioned as is the need to discuss your development of skills across both years of the course.
Para1 - explain briefly what projects you did in the AS and A2.
Para2 - what skills did you have prior to the course. Explain what you understand by the skill you are asked about.
Para3 - referring to specific examples discuss your skills development in the early projects.
Para4 - How did the skill develop while doing later projects - specific examples.
Para 5 - short conclusion