Which one of the following is a secondary effect of earthquakes? 

A)  urban fires 
B)  horizontal displacement of the ground 
C)  shaking of the ground 
D)  release of ejecta

Urban Fires

Fires that occur in cities or towns, which can involve buildings, vehicles, and other man-made structures.

Horizontal Displacement

The distance an object or particle moves horizontally over a period of time, often measured in physics and engineering contexts.

Release of Ejecta

Refers to the process where material is expelled or thrown out, often used in the context of volcanic eruptions or meteorite impacts.