Because it simulates a word-of-mouth recommendation. In addition, a word of mouth promotion is important for every business as each contented customer can ox dozens of new ones your way. The word of mouth is the transient of information from an individual to individual by the oral message which could be as simple as influence somebody the period of a day.
The answer in the first sentence above is hypothesis because it is defined as having to state a prediction or conjecture in regards about an experiment whereas the second sentence' answer is experimental question because researchers tend to state what they plan to do in regards of their investigation and they do not apply any predictions in the experiment.
Lumbini is where Gautam Buddha was born. He and his teachings are known worldwide.
Mt. Everest is the highest mountain in the world.
That's why they are national pride.
Because a person might have done something and then the rest of the people followed because the found that it would help benefit them