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 moon orbits the earth. The earth orbits the sun. The moon comes between the sun and the earth. The sun is totally blocked. A solar eclipse is occurring. 

SOLUTION: How do solar eclipses occur?

PROBLEM: A stream or river must occur. Through erosion, the stream cuts into the soil and bedrock. Through continuous erosion, a deep gash is cut through. After many years the river may dry up. A dry ravine is left. 

SOLUTION: How are ravines formed?

PROBLEM: Add dirty laundry to the washing machine. Add laundry detergent to the washing machine. Select the setting for the load of laundry. Close the door of the washing machine. Turn on the washing machine. 

SOLUTION:
How do you use a washing machine?