I prefer an activity to sitting around.
The report showed increased activity in certain sectors.
the social science that deals with the production
Her favorite activity is coloring.
It functions as a subject of the sentence.
My favorite activity is to ride my bike.
The paranormal activity was high.
Has the dog had a lot of activity today?
The boys family were going to the track to do some racing. That is a good sentence since racing means to compete in an activity to see who will finish first.
people in the map use economic activity to get more money
The gerund phrase "Stopping to smell the roses" functions as the subject of the sentence, highlighting the action of stopping to appreciate the beauty of the roses. It acts as a noun, indicating the activity being described as good advice.
the activity of interpreting a persons character
There is a high probability that this sentence will not qualify as a good sentence.
Like this "I hear vehicular activity outside."