Final answer:
Instant messaging is a real-time internet communication method that allows for the transmission of text messages, falling under Option 1.
Step-by-step explanation:
Instant messaging refers to Option 1: A form of internet communication where users can transmit text messages or chat in real-time via the internet. This is different from encrypting private information or acquiring someone's personal details, which are described in Option 2 and Option 3 respectively. Option 4, which discusses a shift in employment, does not relate to instant messaging. Instant messaging has become a prevalent part of online communication, providing a quick and interactive way for people to connect with one another. Technologies such as smartphones and social media platforms have made it accessible and preferred over traditional phone conversations.
Instant messaging allows for immediate interaction, whether for personal conversations, work-related discussions, or academic purposes. It contributes to the new media landscape, which comprises various forms of digital communication that rely on electronic technology. With the rise of the internet and user-friendly platforms, instant messaging continues to evolve, becoming a critical tool for people to maintain relationships and engage with each other in the digital age.