Manmade enrichment items are those items created by human intervention through manufacturing processes. These items enhance the environment artificially, in contrast to natural items that occur without human involvement.
(A) Natural enrichment items – Incorrect; these are items naturally occurring in the environment.
(B) Tangible enrichment items – Incorrect; refers to items that can be physically touched but not necessarily manmade.
(C) Manmade enrichment items – Correct. Items produced through manufacturing processes.
(D) Intangible enrichment items – Incorrect; these are non-physical elements like fragrance or sound.