Explanation:
the virus which can transfer from one person to another are called smart virus. example corona virus
The answer for this question is b :)
Captive breeding, species survival plan, cloning, endemic,
In general, one should give appropriate care to an ill or injured person until ; One sees an obvious sign of life, such as breathing, or another trained responder or EMS personnel take over, or until one is too exhausted to continue with the care; or when the scene becomes unsafe.