Arctic/Polar is the best answer
The brain stem is central trunk of the brain, consisting of the medulla oblongata, pons, and midbrain, which continues down into the spinal cord.
It forms from plate tectonics.
Deposition from flow into a lake or an ocean
A delta is a feature of a river that occurs at its mouth whereby the river tends to drains into a water body (ocean or lake) through several drainages.
Explanation:
As a river approaches and drains into a water body, like a lake or ocean, it deposits a lot of sediments that it collected upstream. The high gradient upstream gives the river a high energy flow enabling it to have high erosion power and it can carry lots of sediments. The geographical gradient lowers closer to the mouth of the river and much of the sediments settle down due to the low speed and energy of the river flow at this stage. Over years, the sediment accumulates over a large area and the river has to find several channels to drain into the ocean or lake. This forms a delta.
Learn More:
For more on deltas check out these;
brainly.com/question/5429100
brainly.com/question/1453498
#LearnWithBrainly
The Calvin cycle is called the dark cycle because it does not require
light to proceed. Unlike light reactions, the Calvin cycle is a
light-independent reaction, which means it can and will occur in the
dark as well as the light. The Calvin cycle is called the dark cycle
because it does not require light to proceed.
hope this helps :p
