simply
No. Simple is an adjective. The adverb form is "simply."
Adverb
Simply is an adverb (in a simple way, or literally).
Simply.
An adverb
Simplement
"Was copying " doesn't contain an adverb, it is only a verb (or simple predicate).
No. Often is an adverb.
Both?
The adverb is invisibly. Many -LE adjectives can form the adverb by changng the final E to Y (able, ably / simple,simply).
A verb in the simple past.
The noun element has the adjective form elemental. The adverb form is elementally. A related adjective is elementary, which has a connotation of basic or simple. The adverb is elementarily.