For animal that live there no technology is needed. For man to go there and survive, he needs to use special type of submarine called a bathysphere which can withstand the high pressures.
elephants
They need to adapt to high pressure in the (low part of the ocean) deep ocean.
Animals in the deep ocean experience extreme pressure, darkness, and cold temperatures. They have adapted to survive in these harsh conditions by developing unique physiological and behavioral adaptations, such as bioluminescence and the ability to withstand immense pressure. They often rely on scavenging for food due to the limited availability of prey in these deep-sea environments.
Deep ocean trenches are deep slits in the middle of the ocean. The pressure inside these trenches is unbearable. long, curved valleys along the edges of the ocean basin
hard to say
Scientists have not been able to find a way to survive in the deep ocean with out a aqua lung and submersibles. So its scientifically impossible
A polar bear would not be found in a deep ocean ecosystem. Polar bears are terrestrial animals that inhabit Arctic regions and are not adapted to survive in deep ocean environments.
there is higher pressure the deeper you travel into the ocean. this pressure is detrimental to health. also breathing is an issue.
In the deepest parts.(try the Challenger deep.)
they use very strong, thick materials or equilize the pressure on the inside to be the same as the outside
Animals can survive by their gills and they have oxygen in their gills. Humans have been able to survive in the ocean only because of aqua lung and also submersibles also known as submarine's