Answer:
a). their ability to give their own informed consent to participate in the research.
Step-by-step explanation:
Ethical consideration is a very crucial and significant aspect of research. It deals with the moral conduct that the researchers must display with the participants so that they are not put through any kind of harm and their respect is given utmost significance. This is why the informed consent of the participants is mandatory especially in terms of very young kids so that they take part in the research voluntarily in order to bring credible and worthy deductions. Thus, option a is the correct answer.