page 08 11. The cotton harlequin bug has highly variable coloration; individuals may be all‑orange or have blue‑green iridescent patches of variable size. The bright orange colour induces avoidance behaviour in birds but not in arthropod predators such as the praying mantis. The praying mantis lacks a red photoreceptor and has difficulty distinguishing the all-orange bugs from a green background. The graph shows results from an experiment that was carried out to compare the ability of praying mantises to detect all-orange and iridescent bugs of different sizes from different distances. detection distance (cm) Key 70 40 20 10 5 11 12 13 14 15 16 17 bug size (mm) iridescent bugs all-orange bugs trend line for iridescent bugs trend line for all-orange bugs The following conclusions were drawn: 1. Both colour and size of bugs affect detection distance. 2. Iridescent bugs are mostly larger than all-orange bugs. 3. The negative correlation between bug size and detection distance shows that smaller bugs were detected from further away. Which of the conclusions are consistent with the data shown? A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3