The correct answer is: a) Epic ballads.
Glu are a type of Ladakhi folk song that are typically epic ballads. They are often sung in a call-and-response style, and they tell stories of heroes, battles, and other important events in Ladakhi history. Glu are an important part of Ladakhi culture, and they are often performed at weddings, festivals, and other special occasions.
Option b) is incorrect because Glu are not typically devotional songs. They are not religious in nature, and they do not typically praise or worship any deities.
Option c) is incorrect because Glu are not typically songs about nature. They do not typically describe the beauty of nature or the cycle of the seasons.
Option d) is incorrect because Glu are not typically romantic songs. They do not typically tell stories of love or romance.