The research topic must be simple and specific enough for us to accomplish it with consideration of our limitations and within the given period of time .To attain this ,first we have to

Select the word from the list that best fits the definitionstates the the universe is expanding

•as parts of ceremonies and often to ask for peace and blessings from evil. • late at night to entertain themselves or foreign visitors at the camp. • on long journeys through the arizona desert, to keep their energy and minds boosted. • during the long winter nights, when they were cold and the land was not suitable for farming.

The answer for the riddle i am pretty sure is a map.