In this task, you are given a paragraph, and your task is to construct a question from the given passage. Construct question in such a way that (i) it is well explained in the paragraph, (ii) the words may/may not be present in the paragraph, (iii) it should start with what/how/describe. Avoid creating a question that (i) is just relevant to one or two sentences, and (ii) not relevant to passage. 

Example Input: Electricity enters the computer. Some electricity becomes light. Some light becomes heat when it hits something. Some electricity becomes motion in a hard drive, dvd drive or fan. Motion energy also becomes heat. 
Example Output: Describe the energy transformations in a computer

Example Input: Greenhouse gases are released into the air by human activities. The earth changes energy from the sun into heat. Heat rises from the ground. Greenhouse gas molecules in the atmosphere prevent the heat from going into space. The temperature of the earth increases. The temperature continues to rise and melts the polar ice caps. The temperature rises even faster. 
Example Output: Describe the process of the greenhouse effect

Example Input: Energy builds up in the crust of the earth. The energy causes the fault lines give way. The earth's plates move. The energy radiates outward from the fault in all directions. The seismic waves shake the earth as they move through it. 
Example Output:
What causes an earthquake to occur?