Answer to Question 1
Answer: D
Answer to Question 2
Please could you help me with another one. Thank you
Answer to Question 3
Answer: Different magma compositions and types of eruptions, and varying proportions of lava flows to pyroclastic deposits determine the sizes and shapes of volcanoes. Shield volcanoes are small to giant volcanoes composed of many thin and widespread basaltic lava flows. The definitive shield shape is characterized by gentle slopes typically less than 15 degrees. They are active for centuries to a few million years.