Correct option (c) Monera
Explanation:
Maximum nutritional diversity is shown by the members c,f kingdom-Monera. Some of then: are autotrophic (e-g. photosynthetic autotrophic or chemosynthetic autotrophic) while the vast majority a..e heterotrophs (e.g. saprotrophic or parasitic). Ecologically, these may be Producers or decomposers.