Answer:
D. shield
Step-by-step explanation:
A. is not the right answer. Cinder cone volcanoes are the simplest forms of volcanos, on the steeping hill. Lava erupts violently from them.
B. is not the correct answer. A composite volcano is in the shape of a cone and builds up by various layers of hardness lava and ash.
C. is not the right answer. Caldera is made after a large volcano erupts and crashes, and leaves the depression looking like a shallow hole in the ground.
D. is the right answer. Shield volcanos are low, broad, and shallow. They are almost entirely made up of fluid lava flows, and their eruptions are not as aggressive as other kinds of volcanos have. As the lava they make is fluid, it travels further and makes a steady accumulation to the top of the opening. The name shield volcano comes from the resemblance to the warrior shield, circular and with gentle rising at the center.