Answer:
4
If the beaker was not cleaned, starch could have been in it.
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.
<span>The family consumed botulism toxin in the canned green beans.</span>
They are important because so people do not get sickness