Which grain brought to the new world
allowed swamp land to be able to produce food?

rice.

Explanation:

Simple explanation, rice loves water. Infact, if you want to grow rice its very advised to cover the base in water and plant the roots in dirt.

frederick william of brandenburg-prussia trained his son, frederick, to be a hardy soldier. but frederick disliked rifle shooting and horseback riding. unlike his father, he was interested in french literature. he enjoyed poetry and music and, like some others of the enlightenment, he scoffed at religion. his father thought him soft, frivolous and unmindful of his duties. and when frederick refused to put his signature on a right to succession, for a few moments his father strangled him.

the answer is aggresion hope this and mark me as brainiest and add me as friend