The correct option is D sporangia
Sporangia are the tiny blob-like structures found at the tips of sporangiophores which are involved in the reproduction of Rhizopus. It produces and stores spores which helps in germination and eventually develops into new Rhizopus.
Hyphae are thread-like structures (non- reproductive parts) that develop on the Rhizopus to absorb nutrients from the environment and transport them to other parts of the fungus body.
Cyst is a protective wall formed during the multiple fission process in Plasmodium.
Tentacles are the flexible, mobile and elongated organs present in Hydra which contain stinging cells (nematocysts) used for feeding on their prey.