Sound waves are produced by movement. Animals have evolved organs to detect those sound waves in the air or water to perceive movements in their environment. This can be used to find prey, predators and mates.
The sense of touch is useful to feel physical forces such as bites, changes in temperature and texture. Some animals have become extra sensitive to feel very faint vibrations, which give them a lot of information about their environment.
The first sense to evolve in the first animals was chemoreception. It means being able to detect chemicals in the animal's environment. This helps animals find prey and mates, and to sense predators from a distance.