Natural barriers are physical features in the environment that can block or slow down movement. These include mountains, rivers, and forests. For example, the Himalayas create a significant barrier between India and Tibet, making travel and communication more challenging. Such barriers can influence where people settle and how cultures develop. These natural obstacles can also affect wildlife. Animals often have to find ways to navigate around or through these barriers to reach food, mates, or new habitats. For instance, the Amazon Rainforest serves as a barrier for many species, shaping their behaviors and migration patterns as they adapt to their surroundings.