The effect of the message is accurately describes as red coloration of the lungs that looks alarming and adds to the overall message that the flu is threatening.
What is the Video "How Flu Viruses Attack" about?
The video shows an explicit message on how the Flu virus attacks the human body especially the lung part.
However, the implicit message here is that the flu is very life-threatening and this is captured by the image which shows a lung rapidly turn red as the narrators describe the effects of the flu on the lung.
Therefore, the Option B is correct.
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