Final answer:
The dodo bird became extinct due to overhunting by humans and predation by introduced species like pigs, rats, and dogs.
Step-by-step explanation:
The dodo bird, which lived in the forests of Mauritius, became extinct due to a combination of factors. Overhunting by humans played a significant role, as sailors hunted the dodo bird for meat. The dodo bird's lack of fear towards humans made it an easy target. Additionally, the dodo bird faced threats from introduced pigs, rats, and dogs that killed its young and eggs. This combination of hunting and predation led to the extinction of the dodo bird.