Use this fact to answer the question: An example of an instinct is the kangaroo 's ability to crawl into its mother 's pouch to drink milk

A kangaroo can have multiple babies at various stages of life at the same time. These joeys can show remarkable instincts, in that they

Pick from: i. hallucinate; ii. nurse; iii. scream; iv. are born;

The answer is:
ii.