Final answer:
'Runaway selection' is a hypothetical evolutionary process that can result in rapid and extreme changes in the human mind. It occurs when certain traits become exaggerated over time due to mate preference.
Step-by-step explanation:
'Runaway selection' refers to a hypothetical evolutionary process in which certain traits become exaggerated over time due to mate preference. This can result in rapid and extreme changes in the human mind. For example, if individuals with a particular trait are preferred as mates, then offspring will inherit that trait, and the cycle continues. The consequences of 'runaway selection' can include the development of elaborate and exaggerated traits that may not necessarily have a direct survival benefit.