Astatistic that describes a sampled group is called
anecdotal
inferential
analogical
descriptive

A good statistic that describes a sampled group is called descriptive - descriptive statistics are usually the type of statistics which we use when we want to describe different characteristics of a certain sampled group. 

new ideas form the base for the growth of the people.each time they try to develop, they may discover a new form or abilities of themselves this makes the people satisfied in living their life in a happy way.this makes sense that new ideas of people cn change their live.the ideas, if bring their best, they will be changing their present state.

Icould be wrong but i would say b.