This is an example of a "cohort difference."
An cohort study refers to a specific type of longitudinal investigation that example an cohort (a gathering of individuals who share a characterizing trademark, regularly the individuals who encountered a typical occasion in a chose period, for example, birth or graduation), playing out a cross-segment at intervals through time. Hope it helps!
Answer:
converts through chemical process such as contribution volcanation
The period where the bow and arrow was invented in the woodland period
The answer is "common sense".
The
initial source has to be common sense as idioms are usually metaphorical
statements which make sense and relate to the common life.
In
nature, birds of a solitary group do in actuality regularly frame groups.
Ornithologists clarify this conduct as a 'security in numbers' strategy to
diminish the danger of predation. In dialect terms, it was beforehand more
typical to allude to birds flying together than flocking together and numerous
early references utilize that frame.