If grasslands are protected for rhinoceros but water sources dry up, why will conservation be weak?

Correct answer: Because rhinoceros also needs water and wet habitat

Direct answer: Option A is correct. A rhinoceros needs more than grassland. It needs sufficient water for drinking, body functions and cooling, and it needs a suitable moist habitat with shelter and food. Step by step: first, grass is an important food resource; second, water is necessary for survival; third, if water sources dry, the animal may become weak, leave the protected area, or face greater competition and heat stress; therefore, protecting grass alone gives incomplete conservation. Option A works because it includes both water and wet habitat. Option B is wrong because every wild animal needs a suitable habitat. Option C is wrong because grass cannot replace water and other habitat needs. Option D is wrong because water sources are directly related to wildlife survival. Conservation must protect all essential habitat components, not just one resource. Memory cue: food plus water plus shelter makes a complete habitat.