The correct option, encompassing all three tasks—location identification, sleep monitoring, and assisting the hearing impaired—highlights the versatility of wearable technology in enhancing the quality of life. Wearable devices, such as smartwatches and fitness trackers, incorporate GPS for location tracking and sensors for monitoring health metrics like sleep patterns. Additionally, devices like hearing aids integrate state-of-the-art technology to amplify sound and improve communication for those with hearing impairments, illustrating the significant role of wearable technology in health management and personal assistance. This understanding aligns with concepts of technological advancements in health and their social implications, as explored in UPSC-standard materials.