The answer is C. Social Loafing
Mark Brainliest
The temp at the surface of the sun is about 10,000 Fahrenheit.
That researcher was Ivan Pavlov.
These psychic secretions are related to his experiments with dogs - he noticed that dogs would start salivating at the mere sight of food, or person delivering them food, or even the sound of their footsteps (because they knew food was coming). That's why he started experimenting even further - each time he brought them food, he would ring a bell, so eventually the dogs would start salivating every time they heard a bell because they were expecting food.
President John F. Kennedy eloquently evoked this principle in his 1963 address to the nation, following the court-order
The answer is true, hope it helps :)