Cells at Work (Hataraku Saibou)
They produce narrow-band high-frequency sound to help them navigate in water. These high-frequency sounds are used in echolocation. Echolocation is used to identify and locate prey and also avoid the predators. Marine mammals like whales and dolphin use echolocation in different manners.
I would say A or C I’m not sure but if I had to choose A or C my best guess would be A
I hope this helps :)
