The answer is B . Cardiopulmonary resuscitation
The immune system fights off the pathogen by Leukocytes also known as white blood cells. When a pathogen enters the body the immune system becomes alert to it and sends out sends out the Phagocytes (a type of Leukocytes) which engulfs the pathogens.
Electricity is the manifestation of traveling currents. These currents however are unable to move unless one were to complete a "circuit" (Word you are looking for). If the circuit is not completed electricity doesn't travel.
Answer:
Gender ratio in the World
As of 2021, There are 3,970,238,390 or 3,970 million or 3.930 billion males in the world, representing 50.42% of the world population. The population of females in the world is estimated at 3,904,727,342 or 3,905 million or 3.905 billion, representing 49.58% of the world population.
