The most accurate response is: Caribbean colonies provided workers, bases, and POW camps.
During World War II, Caribbean colonies played a significant role in supporting the war effort, even though they may not have been involved in direct combat on their home soil. Key contributions included providing strategic military bases for the Allies, which were crucial for operations in the Atlantic. The colonies also supplied labor to support war industries and agricultural production, which were essential given the demands of the war. Additionally, many Caribbean territories housed prisoners of war, contributing further to the war effort by providing facilities for managing POWs.