Which step will help in bird conservation?

Correct answer: Protecting nests and trees

The direct answer is C, protecting nests and trees. Birds need suitable habitats that provide nesting places, food, shelter, and safe breeding conditions. Trees often provide branches, cavities, leaves, fruits, insects, and protection from danger. Step by step: a safe nest helps birds lay eggs and raise young; trees provide the structure and resources around the nest; protecting both helps birds reproduce and survive; therefore this action supports bird conservation. Option C is correct because it protects the bird’s habitat and breeding place. Option A is wrong because destroying nests removes eggs, chicks, and safe breeding sites. Option B is wrong because cutting trees removes shelter, food, and nesting places. Option D is wrong because polluting water can poison birds and reduce the organisms they feed on. The other options damage habitat instead of conserving it. Exam cue: bird conservation begins with protecting nests, trees, and clean surroundings.