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.
Since Shale is a sedimentary rock, it has clay minerals
Answer: Science
Explanation:
Science is the field that is studied to gain information about natural world through the means of experimented and analyzed facts.This field consist knowledge which is constituted from observation on particular natural subject to learn about it .
Science is important for world development, improvising technologies,resolving natural and scientific issues,producing new application etc.Science is divided in to many sectors such as biology, chemistry etc.
