The correct answer is option B, that is, diminished food supply.
Some of the animals move to comparatively short distances in search of food or more favorable breeding or living conditions. However, the majority of animals, which migrate do so in order to find more habitable conditions and food. The phenomenon can be witnessed in almost all the prime animal groups like mammals, birds, amphibians, fish, reptiles, crustaceans, and insects.
I think is termed: Pressure filtration.
physical defense
chemical defense
camouflage
social defense
Through heat and pressure
