Cordesman points out that Iran's constitution, if followed properly, provides a means of change and reform, if indeed parties are willing to work within its structure.
VOA: standard.2010.06.11
The thing that providesstructure in open-water ecosystems is the food-web, which is hard to observe and malleable.
Eating together providesstructure that helps both children and adults develop sound eating patterns, resulting in regular mealtimes and less solitary munching in front of the computer or the TV.