A first aider's main responsibilities include administering first aid and calling emergency services, but providing first aid training is not part of their duties. Therefore, the correct answer is A. Provide first aid training.
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A first aider's primary responsibilities include administering first aid treatment and calling emergency services. However, providing first aid training is not usually a responsibility of a first aider, as it is typically handled by trained instructors. Understanding these roles helps clarify the expectations of first aid responders. ;