TASK DEFINITION: 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. 
PROBLEM: Sugar enters the body. Bloodstream. The pancreas. Insulin lower sugar levels. Bloo sugar goes back to normal. 

SOLUTION: How does the body control its blood sugar level?

PROBLEM: 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. 

SOLUTION: What causes an earthquake to occur?

PROBLEM: The growing season starts. Bark grows on a tree. The inside of the tree grows. The bark is pushed out around the tree trunk. The bark leaves a ring. The growing season slows down and ends. 

SOLUTION:
How do rings form inside the trunk of a tree?