The answer is C: Lack Chlorophyll. Because fungi are heterothrophic, meaning they ingest food for their energy, instead of making it, meaning they don't use photosynthesis, and have no chlorophyll.
75% species go extinct to be considered a mass extinction
A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.