Evidence is something that makes it clear that

(a) you have understood what is required of you and

(b) you have completed a task or activity to a competent level; it is something you use to assure me, your tutor or assessor, that you understood and applied the knowledge, skills and attitude required to show competence; it is something that you use to make your learning and understanding visible.  The responsibility lies with you to ensure that it is evident and clear from your description and analysis of what you have done, and from any images or recordings you have used to illustrate your competency. The links to published literature you have used will also help to demonstrate you understood and applied the knowledge, skills and attitudes required to show you are competent.