Answer:descriptive study.
Explanation:A descriptive study is one that is designed to describe the distribution of one or more variables, without regard to any causal or other hypothesis.
Descriptive studies can be of several types, namely, case reports, case series, cross-sectional studies, and ecological studies. In the first three of these, data are collected on individuals, whereas the last one uses aggregated data for groups.
Descriptive research is used to describe characteristics of a population or phenomenon being studied.