The Triple Alliance and Triple Entente were formed through the signing of ___?

How do conflict minerals, and in particular, conflict coltan get their name? what groups benefited from the trade in conflict minerals? what group were hurt by it?

Look at this photograph taken during the battle of guadalcanal

Which of the following statements about this graph is accurate? world grain production has increased in every year since 1950. the amount of grain grown between 1950 and 1980 decreased. world grain production has generally increased between 1950 and 2010. more grain was grown in 1950 than in any other year.