Help me please and THANKYOU on question 4

Select three examples of self-harming behavior.da. burning skin with heated objectsb. eating healthy foodsoc. cutting or sticking skin with sharp objectod. bruising yourself with a heavy object

Explain the purpose and function of the icd-10-pcs coding system, include reasons for the transition from icd-9 vol. 3.

Does indrect sunlight does not pose any danger to the skin