Email is the best mode of Internet communication for remote wedding planning, with instant messaging, message boards, and wikis also being beneficial tools.
Email would be the most suitable mode of Internet communication for Alex's family to plan his wedding remotely. Email allows for asynchronous communication, making it easy for family members in different parts of the world to coordinate and make decisions efficiently.
Instant messaging and message boards could also be helpful for quick exchanges and discussions during the wedding planning process.
Wiki could serve as a collaborative platform for sharing wedding ideas and details, enabling family members to work together on planning tasks.
https://brainly.com/question/38522633