Final answer:
Before the consent process starts, a witness must ensure the safety of participants and provide them with informative details to give informed consent.
Step-by-step explanation:
Before the consent process starts, a witness must first ensure the safety of the participants and guarantee that they have been fully informed about the study.
They must outline all the risks and benefits of the study and provide participants with relevant information so that they can give informed consent.
This includes signing an informed consent form, which describes the expectations, risks, implications, and confidentiality of the research.