River Volleys provided all the following benefits PKCEPT- Potential severe floods Protection from invaders Water for agriculture Water for sanitation

River valleys provided numerous benefits to early civilizations, but they did not typically offer "Protection from invaders." While rivers could serve as natural barriers in some cases, they were more often used as routes for travel and trade, which could also be exploited by invaders. Therefore, the correct answer is:<br /><br />Protection from invaders