Which of the following factors made the tohoku earthquake in japan so destructive?
the magnitude
the population
the time of day
the tsunami

hi gavin!

Explanation:

the correct answer is The tsunami!

On March 11, 2011, a magnitude-9 earthquake shook northeastern Japan, unleashing a savage tsunami.

This unexpected disaster was not the earthquake and the largest or deadliest tsunami that hit this time. That record corresponds to the Banda Aceh earthquake and tsunami in 2004 in Sumatra, a magnitude of 9.1.  

But Japan's double blow was especially devastating for the earthquake-aware country, because few scientists had predicted that the country would experience such an earthquake and tsunami.

reflecting point a across the origin negates both of its coordinates.

b = (5, -4)