Her favorite activity is coloring.
My favorite activity is to ride my bike.
The paranormal activity was high.
Has the dog had a lot of activity today?
people in the map use economic activity to get more money
the activity of interpreting a persons character
the social science that deals with the production
Like this "I hear vehicular activity outside."
I was immensely proud of his work.
It is a verb that acts as a noun.
Example sentence - I prefer to monitor the activity of the bear cubs from the cameras placed in the cave.
Skateboarding without a helmet is a perilous activity.
Unpredictable