An introduction is important aspect while greeting someone as it gives the first impression to the observer. People starting forming an opinion about you after greeting you.
The way you introduce you can show your cultural background and may help others to involve in conversation while an improper introduction can offend others.
The range is the simplest measure of variation to find. It is simply the highest value minus the lowest value. Since the range only uses the largest and smallest values, it is greatly affected by extreme values, that is - it is not resistant to change
You didnt list the choices but I know the anwser. <span>It was the heir to the Austro-Hungarian throne his assassination was the spark that ignited World War I.</span>