Because you have a certain amount of land to farm and with that land you need to feed another piece of land
Answer: James Lange theory of emotion.
Explanation: James Lange theory developed independently by two 19th-century scholars, William James and Carl Lange discusses the origin of emotions.
James Lange theory of emotion explains emotions as physiological stimuli occuring as a result of external events.
His physiological stimuli sweating and running happened as a result of the footsteps he heard.
Answer:
Without genetic diversity, natural selection cannot occur
