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: The gravity of the sun pulls its mass inward. There is a lot of pressure on the Sun. The pressure forces atoms of hydrogen to fuse together in nuclear reactions. The energy from the reactions gives off different kinds of light. The light travels to the Earth. 

SOLUTION: How is sunlight created?

PROBLEM: Food enters the mouth. Food mixes with saliva. Food is swallowed. Enzymes in the stomach break down the food. The food moves to the small intestine. Hormones from the pancreas move to the small intestine. The hormones create the amount of sugar in the blood from the food. The sugar in the blood travels to the body. The sugar provides energy for the muscles. 

SOLUTION: How does eating food result in energy for your muscles?

PROBLEM: Waters flows downwards thanks to gravity. Enters the dam at high pressure. The moving water spins the turbines in the power plant. The turbines turn the generators. The generators spin, and produce electricity. The water leaves the dam at the bottom. 

SOLUTION:
How is hydroelectric electricity generated?