Answer:
1. Is when two or more countries trade products that they can not by themselves produce or are too expensive to produce.
2. It happens when the market needs a supply of services and products and the local producers can´t satisfy that need at all or at a affordable price.
3. Because we live in a globalized world.
4. Yes, if the country has enough resources to produce everything, or if the market is willing to not have certain products available.
Explanation:
A good example of countries avoiding economic interdependence would be the socialists or communists countries, Cuba for example had been living for a long time with an economic block from the USA and all of its allies, Cuba could only trade with Russia, soviets, China and Venezuela, they had a extreme lack of products and services but the country was forced to accept it.
Economic interdependence can help the consumer get the best product at the best price and helps increase competition among producers.