The concept of multi-directional development suggests that when change is gradual, as when water carves stone to form a canyon, it is an example of .

continuity

Explanation:

The concept of multi-directional development is psychology suggest that development goes through in continues span and throughout life of human being whether it is biological, cognitive or emotionally.  continuity refer that new knowledge , skill and information will accumulated with previous one  and this process with continues in smooth and specific pattern. Its also means that development occur entire life of human in continues process.

answer: hey improve the marine life in a certain area.

they provide a new location for fishermen to fish and which works to ease the pressure on natural reefs.

they are a great way to get rid of large objects that would otherwise be placed on landfills

explanation:

answer; traditional culture;