In which marine biome would you expect to find organisms that are adapted to withstand extremely high temperatures & a complete lack of sunlight?

So here we have a practice problem that asks, in which marine biome would you expect to find organisms that are adapted to withstand extremely high temperatures and a complete lack of sunlight? And we've got these 4 potential answer options down below. Now, of course, recall from our previous lesson videos that the marine benthic zone consists of the entire ocean bottom or the entire ocean floor, regardless of how shallow or how deep the ocean floor is. But because most of the ocean is extremely deep, most of the benthic zone lies so deep underneath the ocean surface that it receives very little to no sunlight. And so the marine benthic zone is certainly an area where we might expect to find organisms that are adapted to a complete lack of sunlight. However, you might recall that we said the deeper you go into the ocean, the colder the temperatures get, and that is going to be true. However, recall that on the marine benthic zone, there can be, these deep sea hydrothermal vents, and those deep sea hydrothermal vents can expel superheated waters, and that's going to create extremely high temperatures around those deep sea hydrothermal vents. And, again, because there's a complete lack of sunlight around those deep sea hydrothermal vents and extremely high temperatures around those deep sea hydrothermal vents, we might expect to find organisms that are adapted to both there. And so the correct answer to this problem is going to be option d, marine benthic zone. So we can go ahead and indicate that d here is correct, And all of these other options are not going to be the best choice. And so this concludes this problem, and I'll see you on our next video.