A; cold air molecules collide to generate heat energy
NATO is still relevant today because its growth makes it virtually impossible for member countries to be attacked. The correct option among all the options that are given in the question is the last option. IT can be said that with each passing day the importance of NATO is increasing. Unitedly it stands on a stronger ground also for continuing peace.
Because of the belief that helping behavior is motivated by self-interest, it led to claim that there is no such thing as true altruistic behavior.
<h3>What is a
helping behavior?</h3>
This refers to any voluntary actions that is intended to help the others with reward regarded or disregarded.
However, since people believed that helping behavior is motivated by self-interest, it led to belief of no such thing as true altruistic behavior.
Therefore, the Option B is correct.
Read more about altruistic behavior
<em>brainly.com/question/11287458</em>
#SPJ4
Anwser:it’s c and d hope this is write!!
