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happy as a quokka a smiling quokka looking up at the camera. sometimes called the world's happiest animal, the quokka has a face that often appears to be smiling. with its plump cheeks and photogenic grin, the quokka has found fans all over the world. but there is more to this small australian mammal than its adorable appearance; the quokka is a fascinating animal with many unusual biological and behavioral characteristics. once mistaken for large rats, quokkas are actually a type of marsupial. like kangaroos, mother quokkas carry their young (called joeys) in a pouch until they are about six months old. when a joey reaches this age, it is about the size of a lime and ready to start observing the world. it starts by poking its head out of the pouch, and eventually it begins hopping around on its own. a fully grown quokka weighs between five and eleven pounds and is about the size of a small house cat. because of their small size, quokkas have developed specific survival instincts to avoid larger predators. one of their strategies is to seek out habitats that have recently been burned by a wildfire. this might seem like strange behavior, but there is actually a clever reason behind it. during a wildfire, most animals will flee for safety, leaving the area with few predators that could harm the quokkas. additionally, the new growth that begins to develop after a fire is often high in nutrients. quokkas have adapted over time to survive in environments where nutrients are scarce. that's because quokkas have developed the ability to go for long periods of time without eating or drinking—sustaining themselves with fat stored in their tails. some quokkas have been known to go without food for a month or more when they can't find the specific grasses and leaves they like to eat. despite their resilient nature, quokkas are still susceptible to illness. during the mid-twentieth century, researchers in australia noticed that some quokkas in captivity showed symptoms of muscle paralysis.
What survival strategy do quokkas use? a) Living in areas recently burned by wildfires
b) Hibernating for long periods of time
c) Migrating to new areas each season
d) Camouflaging themselves to avoid predators
