| Keystone species deserve protection because these |
| a) | Are capable of surviving in harsh environmental condition | b) | Indicate presence of certain minerals in the soil |
| c) | Have become rate due to over exploitation | d) | Play an important role in supporting other species |
| (d)Keystone species deserve protection because these have a significant and disproportionately large impact on the other species living in community. The number of keystone species is often low as compared to other species but they limit the population of other species. Removal or decreases in number of these species in a community causes serious disruption in structure and function of that community. |