Question

prisoners of war inspired memorial day at the site of in charleston. angola prince rivers stonehenge cotton gin sabotage bunce island malaria sierre leone christmas decorative baskets

Explanation:

Memorial Day has its roots in various historical events. In Charleston, the site of a mass grave for Union prisoners of war inspired Memorial Day. Among the options, "Bunce Island" is not relevant to this context. "Angola" is a country. "Prince Rivers" is a person. "Stonehenge" is in the UK. "Cotton gin" is a machine. "Sabotage" is an action. "Malaria" is a disease. "Sierre Leone" is a country. "Christmas" is a holiday. "Decorative baskets" are items. There seems to be an error as the correct site related to POWs inspiring Memorial Day in Charleston is a mass grave site (not listed in the given options accurately). But if we assume it's a trick - question and we have to pick from the given options, perhaps there is a mis - reference.

Answer:

None of the provided options are correct as the actual site is a mass grave for Union POWs in Charleston (not listed accurately in the given choices). If forced to pick from the given options, there is no valid answer.