Question

16 The only invertebrate that can fly is
Bats
Squirrel
Vulture
Insects

17 The body of an insect is divided into the head, thorax and
metathorax
cephalopoda
mesothorax
abdomen

18 Insects carries out gaseous exchange by means of
thorax
metathorax
abdomen
spiracles

Answer 1

16.Insects -the rest of the listed animals are vertebrates
17.abdomen -the rest are regions in body parts (metathorax and mesothorax) or taxons (cephalopoda)
18. spiracles -these are openings on the body, which lead to respiratory system