Before revision: The deliberate act of keeping cultural heritage from the present for the future is known as preservation (American English) or conservation (British English), which cultural and historical ethnic museums and cultural centers promote, though these terms may have more specific or technical meanings in the same contexts in the other dialect.
After revision: The deliberate action of keeping cultural heritage from the present for the future is known as preservation (American English) or conservation (British English), which cultural and historical ethnic museums and cultural centers promote, though these terms may have more specific or technical meanings in the same contexts in the other dialect.