The dogfish shark possess some characteristics, which make it easy for it to swim through the water. The fish possess a nose shape which helps it to swim smoothly through the water, Also, it has a caudal fin, which moves the shark upward when the fish is flapping its fins. These adaptations make it easier for dogfish shark to be stable in its habitat.
I believe the answer is A
The small intestine is the longest part of alimentary canal with a length of 4.5 to 7 m and narrow in width, while the large intestine is the hinder-most part of the alimentary canal with a length of 1.5 m. it called the large intestine because it has a width of 4-6 cm. Also in the large intestine circular folds are absent while its present in the small intestine.