Preliminary, non-experimental, research that gathers information about behavior is called 
research.
Answer:
B.) Cross-country skiing; tennis
Hope this helps :)
The answer would be false
<span>the diaphragm
It sits right below the lungs and makes the air flow as it contracts :) </span>
CPR is an emergency method of heart pumping in case of attacks and includes artificial ventilation. 100 compressions should be performed every minute.
<h3>What is CPR?</h3>
CPR is a cardiopulmonary resuscitation method of an emergency first aid tool used as a life-saving technique in case of heart attacks and drowning.
CPR is given to a person when the heart rate is very less and the pulse rate is very faint. The rate of the compression varies for age groups and should be given with a perfect rhythm and sync.
Cardiopulmonary resuscitation should be given as 30 compressions and then artificial breath or ventilation in between followed by another 30 compressions.
Therefore, option C. 100 compression in 1 minute is correct.
Learn more about CPR here:
brainly.com/question/1383530
