a) Migratory animal

b) Camouflaged animal

c) Predator animal

d) Biological control agent

e) Phytophagous animal

f) Chemical defence agent

Solution:

a) Migratory animal – Siberian crane, salmon, dolphin, etc

b) Camouflaged animal – Grasshopper, chameleon, Frog, etc

c) Predator animal – Tiger, sparrow, lion, etc

d) Biological control agent – Myxoma virus to kill European rabbit, Gambusia fish to check the growth of mosquito larvae, moth against prickly pear cactus, etc

e) Phytophagous animal – Locusta insect, beetle, butterfly, etc

f) Chemical defence agent – Cardiac glycosides produced by Calotrop