A problem is a challenge or difficulty that needs to be addressed. For example, many communities face the issue of littering, which can harm the environment and public health. When people throw trash on the ground instead of using bins, it creates an unsightly and unsafe area for everyone. A solution involves finding a way to resolve the problem. In the case of littering, communities can organize clean-up events and launch awareness campaigns to educate residents about the importance of keeping their surroundings clean. By encouraging responsible behavior and providing proper disposal options, communities can significantly reduce litter and improve their environment.