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 virus finds an animal cell. The virus attaches to the cell's surface. The cell swallows the virus. The virus' RNA is released into the cell. The cell mistakenly reads the virus' RNA instead of its own. The cell creates new viruses. The animal cell releases the new viruses. The new viruses can infect more cells. 

SOLUTION: How does a virus infect an animal?

PROBLEM: 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. 

SOLUTION: How does oil form?

PROBLEM: Waste products are deposited in the blood. Blood is carried to the kidneys through the renal arteries. The kidneys contain filters inside. The filters capture the waste products. The waste is combined with water to make urine. The urine leaves the kidney and is collected in the bladder. The cleaned blood is returned to the body. 

SOLUTION:
Describe how kidneys work