Question

pls pls pls pls explain​

Answer 1

4) which can be physically broken and even it can not be joined or made the same again
5)why protein is used in our body

Answer 2

4th question answer goes like this The glass tumbler broken can't be made into a new one by various ways hence it is an irreversible physical change all other options are reversible changes in the sense they can be reversed and recreated once again ....5 th question proteins help in metabolism (basal) theresore they give rise to many other and perform specific functions in our body hence they are required in our diet