Answer:
Two body segments.
Step-by-step explanation:
- The trait that would best indicate that a particular arthropod was a member of subphylum chelicerata is that it possess two body segments instead of three;
- A fused head and thorax (cephalothorax), and an abdomen (opisthosoma).
- Their segmented body with jointed limbs is covered in a cuticle made of chitin and proteins.