Dr. bloom wanted to learn if ice cream preferences were different at different stages of development. for her study, she conducted a one-time assessment in which she asked a group of 5-year-olds, a group of 15-year-olds, and a group of 30-year-olds to identify their ice cream preferences. dr. bloom conducted a

Dr. Bloom conducted a  "cross-sectional study".

A cross-sectional study analyzes the connection between malady (or other wellbeing related state) and different factors of enthusiasm as they exist in a characterized populace at a solitary point in time or over a brief time frame.

Cross-sectional studies can be thought of as giving a preview of the recurrence of a sickness or other wellbeing related attributes (e.g. introduction factors) in a populace at a given point in time. Cross-sectional investigations are utilized to survey the weight of sickness or wellbeing needs of a populace and are especially helpful in educating the arranging and designation of wellbeing assets.

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.