Instruction:
What is the difference between the words ‘this’ and ‘that’?

Response:
The difference between ‘this’ and ‘that’ has to do with proximity.  When referring to something that is in close proximity you would use the word ‘this’: “This finger hurts me the most.”  Conversely, if something far away you would use the word that: “That hill off in the distance is called the Blue Hills.”