Hello can someone help me out i will give brainliest. Its chemical or physical hw

16- physical

14- chemical

15- chemical

13- physical

Explanation:

A chemical change would be something like the burning of wood, it's an object changing into something new, or something changing. A physical change would just basically altering something like bending wood, it's still wood whether or not you bend it.

b) mutualism

hope this : )