What level of government do you think should be in charge of security from foreign enemies? write a paragraph explaining why this level of government is most appropriate.

Federal government.

Explanation:

The U.S. federal government may be defined the national government that includes almost five territories, 50 states and federal district. This government includes the executive, judicial and legislative.

This federal form of government is important  as it is quite effective and provide proper protection and security than the other government of the country. The states involve in the federal government has different size and do not requires the invasion from the enemies.

Thus, the answer is federal government.

1. glaciers are melting

2. more water going into ocean (water's such as fresh waters, etc)