The is an exotic animal in australia that was introduced by european settlers a. koala b. kangaroo c. emu d. horse

Koala is an 'exotic animal' in Australia which was introduced by 'European settlers'.

Explanation:

Koala bear is an arboreal herbivorous animal that is native to Australia. It is a typical inhabitant of Eucalyptus woods, depending on its leaves for diet. Japanese and European tourists were having Koala on top of their list to see. They were hunting extensively for its soft, sooth fur that is used in rugs, coat linings, muffs, women's accessories.In the early '20th century', almost one million koalas were killed by these European settlers in Australia.