The correct option is D. poison claws. Detailed Explanation: Centipedes and millipedes are both arthropods belonging to the class Myriapoda, but they have distinct differences in their anatomy and behavior. Here’s a breakdown of why option D is the correct answer and why the other options are not. Why Option D is Correct:

• Poison Claws: Centipedes possess a pair of modified legs known as "forcipules" that are located just behind their heads. These forcipules are venomous and are used to capture prey and defend against predators. The venom can cause pain and swelling in humans, making centipedes effective hunters. In contrast, millipedes do not have these venomous claws; instead, they have a different defense mechanism, often secreting toxic chemicals to deter predators.

Why the Other Options are Incorrect:

• Option A: Colour: While centipedes and millipedes can differ in color, this is not a reliable distinguishing feature. Both groups can exhibit a range of colors, including browns, blacks, and reds. Color can vary widely even within the same species due to environmental factors, making it an unreliable characteristic for differentiation.
• Option B: Numerous Abdominal Segments: Both centipedes and millipedes have numerous body segments, but this option is misleading. Millipedes typically have more body segments than centipedes, often ranging from 30 to over 400 segments, while centipedes usually have fewer (around 15 to 177 segments). However, the number of segments alone does not serve as a definitive distinguishing feature since both groups have many segments.
• Option C: Paired Legs on Each Abdominal Segment: This statement is also misleading. Centipedes have one pair of legs per body segment, while millipedes have two pairs of legs per segment. This means that while millipedes do have paired legs, centipedes do not, making this option incorrect. The presence of paired legs is a characteristic of millipedes, not centipedes.

Summary of Key Points:

• Centipedes have venomous claws (forcipules) used for hunting, while millipedes do not.
• Color is not a reliable distinguishing feature between the two.
• Millipedes generally have more body segments than centipedes.
• Centipedes have one pair of legs per segment, while millipedes have two pairs.

Revision Summary:

• Centipedes possess venomous claws for hunting; millipedes do not.
• Color differences are not a reliable way to distinguish between them.
• Millipedes have more body segments and two pairs of legs per segment.
• Understanding these anatomical differences is crucial for identifying these two groups of arthropods.