Answer:
a) Dolphin - Echolocation is used by dolphins to find prey because it allows them to use sound waves to locate objects and determine their size, shape, and distance. This adaptation is crucial for dolphin survival as it enables them to efficiently catch fish, their primary food source. By emitting clicks or whistles and listening to the echoes bouncing off objects, dolphins can accurately locate schools of fish, even in dark or murky waters.
b) Opossum - Playing dead is a behavioral adaptation used by opossums as a defense mechanism against predators. When threatened, opossums will roll onto their back, become limp, and even emit a foul odor to mimic the appearance and scent of a dead carcass. This behavior often confuses predators, giving the opossum the opportunity to escape. By playing dead, opossums increase their chances of survival when confronted by larger predators by appearing unappetizing or already consumed.
c) Bird - Migration is a behavioral adaptation employed by birds to find better food and breeding grounds. Migration allows birds to travel long distances to areas that offer more abundant food resources and suitable environments for nesting and raising their young. Birds usually migrate seasonally, flying to warmer regions during winter or cooler climates during breeding seasons. By migrating, birds ensure their survival in changing seasons by finding environments that are more conducive to their reproductive success and food availability.
d) Bear - Hibernation is a behavioral adaptation used by bears to conserve energy during the winter months when food becomes scarce. During hibernation, bears enter a state of metabolic slowdown, drastically reducing their heart rate, breathing rate, and body temperature. This adaptation allows bears to live off their stored fat reserves for several months, without the need to search for food which may be scarce due to environmental factors. Hibernation helps bears survive the winter by minimizing their energy expenditure and enabling them to wait out the period of food scarcity until more favorable conditions return.