A) A-Behavioural, B-vertebrates, C-invertebrates, D-temperature
B) A-Behavioural, B-bird, C-mammals, D-temperature
C) A-Physiological, B-bird, C-mammals, D-temperature
D) A-Behavioural, B-vertebrates, C-invertebrates, D-morphology
Explanation
A-Physiological, B-Bird, C-Mammals, D-Temperature