4 Ans. Coevolution of Hummingbirds and ornithophilous flowers lead to Mutualistic relationship. Ornithophilous flowers have nectar suited to the Hummingbirds\' diet, their color suits the birds\' vision and their shape fits that of the birds\' bills. Coevolution of Angraecoid orchids and African moths. Moths are dependent on the flowers for nectar and the flowers are dependent on the moths to spread pollen so they can reproduce also leading to evolutionary growth. Solution 4 Ans. Coevolution of Hummingbirds and ornithophilous flowers lead to Mutualistic relationship. Ornithophilous flowers have nectar suited to the Hummingbirds\' diet, their color suits the birds\' vision and their shape fits that of the birds\' bills. Coevolution of Angraecoid orchids and African moths. Moths are dependent on the flowers for nectar and the flowers are dependent on the moths to spread pollen so they can reproduce also leading to evolutionary growth..