Question

In a __________ design, one group of participants is followed and assessed as the group ages. cohort behavior genetics cross-sectional cross-sequential longitudinal

Answer 1

I believe the answer is :Logintudinal research

Longitudinal research refers to an experiment in which the observation/data gathering would take a lot of time.
Example of a test that usually would be done through longitudinal research would be "the effect of vegetables to the children development until they hit puberty"