Hello,
The answer should be "sound waves".
Reason:
If a gun go off the sound waves can go through anything to allow the person to hear for example: the sound wave can go through walls, water, and hard surface. It can also allow you to hear something but not see it therefore the answer is sound wave!
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit
A biome is a large community of plants and animals that is in a area with a distinct reagion. There are 5 types of biomes worldwide. These are aquatic, desert,forest, grassland, and tundra. Hope this helps
