What was the bush doctrine?
a belief that the united states had to protect its allies
a belief that the united states had the right to remove perceived threats
a policy of non-engagement with allies unwilling to go to iraq
a policy of multilateral engagement for the capture of osama bin laden
a policy that stated the use of waterboarding was appropriate as a form of interrogation

The Bush Doctrine was a belief that the United States had the right to remove perceived threats.

Explanation:

The Bush Doctrine was a term used to describe a set of principles related to the foreign policy of former President George W. Bush, declared as a result of the September 11, 2001 attacks. The phrase initially described in the policy stated that the United States had the right to treat as terrorists the countries that host or support terrorist groups, which was used to justify the invasion of Afghanistan.

It later added additional elements, such as the controversial preemptive war policy, which claimed that the United States should oust foreign regimes that posed a perceived threat to US security, even if this threat was not immediate (used to justify invasion to Iraq).

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.