The correct option is C Rivers
Dams are constructed in rivers to generated hydro electric power, irrigation, fishing etc multipurpose activities. On the other hand for the construction of dams many people becomes homeless and lakhs of acara of land lost with the construction of this big dam projects on rivers. For the construction of big dams huge area is required for this, so many people lose their home and sometimes nearby areas of dams becomes food prone. Environment of the place also get affected and bio diversity imbalance also found on those ares.