Which type of study is most sensitive to developmental changes

A)  cross-sectional
B)  naturalistic observation 
C)  case study
D)  longitudinal

Developmental Changes

Transformations or transitions in physical, cognitive, social, and emotional capacities that occur as an individual ages or matures.

Cross-sectional

A type of study or analysis that examines a population or a specific subset at a single point in time, allowing researchers to analyze data from a population at a specific time.

Naturalistic Observation

A research method in which subjects are observed in their natural environment without any manipulation by the researcher, used to study behavior in a real-world setting.