What activity is it?
collecting rubbish
What activity is it?
cleaning the street
What activity is it?
collecting books
What activity is it?
collecting stamps
What activity is it?
tutoring homeless children
What activity is it?
growing vegetables
The word has the same meaning as "tutor"
teach
What activity is it?
planting trees
What activity is it?
helping people
This activity is .........
donating clothes