Respuesta :

The central idea of "Agassiz and the Fish,by a student" is stated in the story. 

"Facts are stupid things," he would say, "until brought into connection with some general law." - This is what Professor Louis Agassiz said after he let his students do a lot of observation on a number of fishes.

The facts that have been discovered in observing the fish are not relevant until it became connected to another bigger idea. Simply put, one needs to study the part and its various functions and uses to understand the whole. 

Answer:   The correct answer is :  The central idea is the need to make an observation carefully, to look again and again and to be able to study the reality in front of us.

Explanation:  Agassiz was the founder of the Harvard Museum of Zoology and a professor there as well. The detailed observation that he ordered his student to make initially from a fish and then to make the comparison between many fish, cost the student a lot of work but finally he recognizes that it was a great legacy that his teacher left him.