Which of the following statements about beaks of birds is/are true?(i...
Explanation:
The correct answer is option D, which states that all the given statements (i), (ii), (iii), and (iv) are true about beaks of birds. Let's discuss each statement in detail:
(i) Beaks can be used as weapons:
- Many bird species use their beaks as weapons to defend themselves against predators or to compete with other birds for resources.
- Birds with strong and sharp beaks, such as raptors (eagles, hawks, falcons), can use them to catch and kill prey.
(ii) Beaks are primarily used for feeding:
- The primary function of a bird's beak is to gather and manipulate food.
- Different bird species have adapted their beaks to suit their specific feeding habits.
- For example, hummingbirds have long and slender beaks to reach nectar deep inside flowers, while woodpeckers have strong and pointed beaks to drill into tree trunks for insects.
(iii) Beaks are used to preen and make nests:
- Birds use their beaks to preen their feathers, which helps to remove dirt, parasites, and maintain their insulation.
- Some bird species also use their beaks to construct and shape their nests, gathering materials and arranging them in a suitable manner.
(iv) Beaks are used in courtship displays:
- During courtship displays, male birds often use their beaks to perform various actions to attract females.
- These actions can include singing, colorful displays, and beak movements or gestures.
In conclusion, all the given statements are true about the beaks of birds. Beaks serve multiple functions, including feeding, defense, preening, nest-building, and courtship displays.