I guess the stomach is held in place by a variety of Muscle cells, Epithelial cells, and connecting tissues; so the answer is: all of the above.
The naked mole rats' population increases by the reproduction of the queen. The colony has one queen that may produce as many as 30 pups in one litter. The female can live up to 18 years, continues to breed and produce every 80 days.
I believe the cerebrum is the largest part of the brain, so the answer should be C.
Increased atmospheric carbon dioxide will diffuse to the ocean water (since normally, there is lower concentration of dissolved carbon dioxide in the ocean water). The dissolved carbon dioxide takes into the form of carbonic acid thereby increasing acidity of ocean water. More often than not, the acidification of ocean water leads to detrimental results especially in marine organisms that are pH sensitive such as coral reefs and many invertebrates.
Topography is the answer :)