Since your question states it is about research and asks for topic ideas for "a descriptive research", I will assume that you need to choose a topic for a research study rather than write a descriptive essay. Of course a descriptive essay is part of what you would write to report your findings; however, you ask for topic ideas. A descriptive research is a type of quantitative research. Its purpose is to find information about the phenomena, conditions or variables surrounding a topic. Some primary methods used in descriptive research are case-study, correlational and survey methods. Knowing this, look to current controversial trends in society as possible topics. Possibilities include:
The harmful impact of the typical American diet.
The number of Americans that recycle on a regular basis.
The amount of time students use on social media.
The average college debt of undergraduate and graduate students.
How many public schools have cut arts programs.
How often do high school...
athletes succeed in college programs.
How healthy is the average public school lunch.
The number of low socioeconomic students that fail state standardized testing.