Question : Fill in the blank with the most appropriate option.
Societies need to develop highly_____ behavioural rules for survival.
Option 1: readjusted
Option 2: adopted
Option 3: adaptive
Option 4: matched
Correct Answer: adaptive
Solution : The correct choice is the third option .
Adaptive means having the tendency to change according to the changing situation. This conveys the intended meaning that societies need to develop behavioural rules for survival, which can change according to the conditions.
Therefore, the complete sentence is: "Societies need to develop highly adaptive behavioural rules for survival."