The essence of science is ________
ethical behavior on the part of researchers, the use of sophisticated methodology, its way of thinking, or effort and hard work© BrainMass Inc. brainmass.com March 4, 2021, 6:14 pm ad1c9bdddf
In analyzing each of the possible answers, I would immediately remove the 'effort and hard work' as a possibility since it is really not an 'essence' of science.
I personally would argue that the answer is 'its way of thinking', only ...
The essence of science is debated.