osmosis is being shown with dye spreading across this cup with water.
For endocytosis you open the bag and close by making a chamber around the eraser and then cut a hole using the scissors to cut a hole in the chamber and pull the eraser into the bag then you have inside the bag .
On exocytosis you must put the eraser in bag and put a chamber around it. Cut the bag using scissors on the outside of the bag and pull the eraser though.
I am a dentist who is actively cleaning peoples teeth which is like active transport.
You eat an orange and it naturally is digested this would be passive transport.