The primary function of the Calvin cycle is to change carbon dioxide into usable energy known as glucose. So Option A.
Brainsliest would be appreciated.
C. The precipitation cannot meet the growing demands for water
I think the answer should be medulla oblongata or foramen magnum.
The major nerves that leave brain should form a thick cord in the brain stem that called medulla oblongata. Medulla oblongata will pass a big hole in the base of the skull that called foramen magnum. Depends on what part the question asked(bone or tissue), it probably between those two options.