This is the 847th most frequent Greek word.
δραστηριότητα
"Activity."
In this sentence, 'δραστηριότητα' refers to physical or exercise activities that benefit one's health.
Η φυσική δραστηριότητα είναι σημαντική για την υγεία.
Physical activity is important for health.
Here, 'δραστηριότητα' represents the dynamic or effortful action exhibited by the student in an academic context.
Ο μαθητής ανέπτυξε πολλή δραστηριότητα στη σχολική εργασία.
The student exhibited a lot of activity in their schoolwork.
In this context, 'δραστηριότητες' (plural of 'δραστηριότητα') refers to organized pursuits or programs outside of the regular school curriculum.