Uses appropriately formal tone; clearly addresses writing prompt

What is this type of statement called?

Hmm ... the answer is this question is D. Details, consequences are given for a particular situation. e. g Cholera has spread in some areas due to poor development of sewage system and very poor hygiene. This increases the chance that people are infected by the bacteria vibrio cholera. In turn, this results in severe diarrhea and may lead to death due to severe dehydration.

The thesis should be clear and precise Do not use short sentences to express a problem.