Question

The action or process of changing something in order to improve it is called

Answer 1

Revitalize.
it would be more helpful if you had given the choices.

Answer 2

Comprehensive list of synonyms for to make something better, by Macmillan Dictionary and Thesaurus. ... enhance. verb. to improve something, or to make it more attractive or more valuable ... verb. to help something to increase, improve, or become more successful