What are informal leaders​

an informal leader = is defined as An individual within an organization that is viewed as someone worth listening to due to their perceived experience and reputation among peers. The informal leader does not hold any position of formal authority or power over the peers choosing to follow their lead but can influence the decisions of others.

Explanation:

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interdependence is when all participating groups and individuals depend on each other. if you depend on one anothers goods, you end up trading in order to get the items you're looking for. (for ex: if i have food and you have water, we trade in order to depend on each other to live)