Neutralization is a reaction between a(n)
a. acid and a base.
b. acid and a metal.
c. base and a salt.
d. salt and water.

When an acidic solution and a basic solution come together, they cancel each other out thus neutralizing. So A is your answer

Answer) by studying proton collisions hope this : )

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.