<span>Different pressure levels
Hope this helps and please award brainly :)
</span>
Answer:
Swim bladder
Explanation:
Swim bladder is an organ in bony fishes such as catfish that controls their buoyancy. It is also known as air bladder. The swim bladder contains gas, mainly oxygen and functions as a hydrostatic organ.
As the fish moves in deeper water, the gas in the swim bladder is contracted which decreases the volume of swim bladder.
Plants have the fewest similarities with the other two groups of organisms.
<h3>Plants vs animals</h3>
Plants generally comprise all living organisms that have chlorophyll and are able to manufacture their own foods by photosynthesis.
Animals, on the other hand, are living organisms that cannot manufacture their foods and are mobile. Animals are either vertebrates or invertebrates.
Plants qualify as living organisms because they are able to feed, excrete, reproduce, grow, respond to stimuli, die, and carry out other basic characteristics of living organisms.
More on plants and animals can be found here: brainly.com/question/5018082
#SPJ1