A.I. Explanation:

Option 1: "People enjoy severe kind of entertainment."

Explanation: This option is incorrect because the text does not mention anything about 'severe' entertainment. Instead, it focuses on the positive effects of laughter, which is not aligned with the idea of severity. The text emphasizes laughter as a beneficial and enjoyable experience rather than a severe form of entertainment.

Option 2: "People like to learn new ways to communicate."

Explanation: This option is incorrect as the text does not discuss learning new ways to communicate. It primarily highlights the health benefits of laughter, such as boosting immunity and reducing stress, rather than focusing on communication skills.

Option 3: "Laughter can express human emotion."

Explanation: While laughter does express human emotion, this option is incorrect because the text does not specifically mention this aspect. The main focus of the text is on the health benefits of laughter, such as its ability to boost immunity and lower stress, rather than its role in emotional expression.

Option 4: "Laughter boosts immunity and keep heart healthy."

Explanation: This option is correct as it directly reflects the information presented in the text. The text states that laughter boosts immunity and helps prevent heart disease, making it clear that these health benefits are significant reasons why people welcome laughter. The phrase 'boosts immunity' and 'heart healthy' are paraphrased from the text, supporting the idea that laughter is beneficial for health.