The dermis of mammalian skin, including that of humans, contains a large amount of extracellular matrix proteins, including collagen and elastin. As a person ages, the amount of elastin in the dermis declines. Which cell types is likely to be the cause of this change in the dermis of the skin?

a fibroblast

Explanation:

Based on the scenario being described within the question it can be said that the cell types that is most likely the cause for this would be a fibroblast. This is a type of biological cell that synthesizes the extracellular matrix and collagen, as well as other responsibilities such as producing the structural framework (stroma) for animal tissues.

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