The following text is for question 5.

    Earthquake is one of natural disaster that destroying a certain area the most. It recently happens in Tasikmalaya, West Java Province. Earthquake are caused by suddenly breaks of underground rock along a fault. This sudden release a huge amount of seismic wave energy. The ground will be shaken when it happen. When two plates or two blocks of rock are rubbing against each other, they will be sticked together. But, they don't slide smoothly. The rocks are not moving but still pushing against each other. After several time, the rocks will be broken due to all the pressure that's built up. When those rock break, the earthquakes happen. This is horrible and we have to maintain our environment, so there will be no earthquakes happen.

Choose the reasons for the event below. The answers can be more than one.

An earthquake happens because ....