Hello, The answer for number 1 will be D) Charring of a Marshmallow, because you are burning the marshmallow, when you mix the fire with the Marshmallow you will get the final product, making it a chemical change.
The answer for number 2 is B) The changed substance retains its unique properties. Because when a physical change takes place, only it's form will change, making it's particles, and properties the same.
Hope it helps :)
