Final answer:
Science-fiction writers predicted the mobile phone, which became a reality through technological advancements in wireless communication, such as microwave transmission and satellite technology.
Step-by-step explanation:
An invention predicted by science-fiction writers that became a reality is Mobile phones. Early science fiction works envisaged various communication devices that people could use to talk to each other from great distances. Mobile phones, as we know them now, were developed as a result of advancements in technology, such as the use of microwave transmission, communications satellites, and other wireless innovations that allowed for portable, satellite-based communication. These devices revolutionized how people connect worldwide, providing access to information and the ability to communicate across the globe.