Quote:
Our ancestors developed massive jaws as a result of constant combat. As civilization decreased the necessity for combat, nature (i) _______the size of the average human jaw.
Blank (i)
magnified
modified
reduced
ruminated
parodied
In 1st line, "As a result" implies
"Constant/More combat = bigger Jaw"... We can also extrapolate from here
"Lesser combat= smaller Jaw"
2nd line tells, Necessity decreased for combat, Hence, According to our extrapolation, The size of Jaw also should be reduced."
Since "Reduced" is given as choice. So we don't need to cross check other options. That's a pretty easy one.