Explain why you think a country needs rules about who is a citizen and who isn't.

A country needs rules to keep Law and Order without this the countries government system will fail. Proving citizenship is important because of the currency, take Mexican immigrants for example they cross the border illegally and find work on american soil, then the majority send money back to their family in mexico because american dollars are slighty worth more than "pesos" this over time will ruin the american economical system and this is why citizenship is important to a country.

Explanation:

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.  

he killed his so.