Read the passage and answer the question.
Passage: Social media platforms were designed to connect people, but research increasingly suggests they may also drive social division.
Algorithms prioritize content that provokes strong emotional reactions — often outrage — because such content keeps users engaged longer.
As a result, users are frequently exposed to extreme viewpoints, which can reinforce existing beliefs and deepen polarization between groups.
According to the passage, why do social media algorithms favor emotionally provocative content?