Russian Orthodox Christianity. So im assuming the answer is Christianity.
Answer:
A newspaper, article, video or any other media created by medical institutions or health professionals.
Explanation:
A source with bias-free information about second-hand smoke and the danger it can cause children with asthma, can only be a source made by healthcare professionals. This is because these professionals or institutions will be able to provide relevant, accurate and rational information that will really inform the reader with concrete facts about passable smoking and the danger for people with asthma.
