I am thinking that this is a trick question. If a part for a manufactured item was not necessary for that item, the part would not be used in the manufactured item.
Odd question.
The statement of cost of goods manufactured (COGM) is part of the Profit and Loss or Income Statement and it determines the actual cost of the WIP Inventory (Work in Process) on hand in a manufacturing facility.
Wood is not manufactured. It grows. It is part of a tree!
as useful as " is conduction or what part of speech it is?
Nothing. It's just a brand that is part of the Carlo Biagi Bead Collection. As it is a fashion item whether or not it is useful depends on your style.
iris
Manufactured is a verb (past tense of manufacture) and an adjective (manufactured goods).
It's tail!
chromosomes
your head(brain)
Neutron
the DNA
The part with words on it.