How dis the slave trade affect africa

Slave trade left Africa underdeveloped, demographically unbalanced, and vulnerable to future European colonization.

question is unclear.

i can't sorry.

post the full question so i can .

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.