A fundamental constant is one that has to be measured by experiment, rather than being derived from any other quantities. Which values we choose to make fundamental and which ones are derived are somewhat arbitrary.
Koalas are native to southeastern and eastern Australia, living in forests of eucalyptus trees. They are basically sedentary animals that need to sleep a lot to give them time to digest their food. Being on the ground all the time would be a disadvantage, because predators could catch them easily.
Koala Habitat. 'Habitat' refers to the types of bushland that Koalas like to live in. They are found in a range of habitats, from coastal islands and tall eucalypt forests to low inland woodlands. Today they do not live in rainforest, although it is thought that millions of years ago the ancestors from which today's Koalas evolved lived in the rainforests which covered much of Australia at that time.