The island of , by 1840, was the world's largest producer of sugarcane.

 Cuba

Explanation:

By mid 19th century Cuba succeed more than other Caribbean islands in sugar production because of its geography (plain terraines perfect for crops) and they also had better harvesting methods including steam engines, watermills, vacuum pans and enclosed furnaces, so production was high. Slavery stayed longer in Cuba compared to other Caribbean islands, which also contributed to their success.

explanation:

aids

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.