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. 

[EX Q]: Plants produce fruit which contain seeds of the plant. An animal eats the fruit from a plant. The animal digests the fruit. The seeds are not digested. The seeds pass through the animal's digestive system. The seeds are in the animal's droppings. The seeds are now in another location and can grow. 
[EX A]: How do plants use animals to help disburse their seeds?

[EX Q]: Put water in an ice cube tray. Put the ice cube tray in the freezer. Wait 5 to 6 hours. Take the ice cube tray out of the freezer. Bend the tray slightly to get the ice cubes out and into a drink. 
[EX A]: How do you make ice cubes?

[EX Q]: Algae and plankton die. The dead algae and plankton end up part of sediment on a seafloor. The sediment breaks down. The bottom layers of sediment become compacted by pressure. Higher pressure causes the sediment to heat up. The heat causes chemical processes. The material becomes a liquid. Is known as oil. Oil moves up through rock. 
[EX A]:
How does oil form?