In the 21st century, U. S. efforts to limit the development of nuclear weapons have focused on which two countries? India and Pakistan
Iraq and Afghanistan
Iran and North Korea
Israel and Saudi Arabia

Iran and North Korea

Explanation:

modern movements fear the nuclear weapons of North Korea and Iran.

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.

the correct answer is ''the programs costs have risen dramatically in the recent past'' hope this !