ELI5: Explain Like I'm 5

Underwater construction

Underwater construction is when people build things in the water. Just like you can build a house on land, you can build things underwater too! To do this people use special tools, machines, and techniques. People build things underwater because it helps us to explore the deep sea and also helps us to look after and protect the ocean. Some things people build underwater include bridges, pipelines, and special structures. These underwater structures help scientists carry out things like underwater research. Underwater construction is an important way our world explores and takes care of the ocean!