How do colonial organisms relate to colonies of people or insects?

1) Colonial organisms require large areas with resources to sustain the entire colony, just as colonial people do. They are unable to grow in places that are sufficient to sustain a small number of organisms and if their population becomes to large, the colony collapses on itself. This is all visible in people as well.
2) Colonial organisms have greater safety due to their large numbers; however, unlike individual organisms, they are unable to sustain themselves with a smaller number of resources and migrating from one area to another is also more difficult for them.
3) A multicellular organism is more mobile and able to perform more functions in a better manner; however, this also leads to greater energy requirements than that of a single celled organism.

They require large areas with resources to keep the entire colony, just as colonial people do. They are unable to grow in places that are able to sustain a small number of organisms and if their population becomes too large, the colony collapses on itself. 

The littoral zone. . .