Which of the following is true of fault-block mountains and volcanic mountains but not true of folded mountains? a. form from the buildup of lava and ash b. may have a steeply sloping, jagged appearance c. may have a gently sloping, dome-shaped appearance d. form at both convergent and divergent plate boundaries

The correct answer is (D)

Option (D)

Explanation:

Fault-block mountains are formed by the tensional forces in which one block goes down and the other block moves up. They are generally not so steep. For example, Sierra Nevada mountains of North America.Volcanic mountains are hot enough, comprised of ashes and lava, and its slope ranges from steep to gentle. For example, Mount Vesuvius.Folded mountains are formed due to collision of two plates, such as the Himalayas.

                           Thus the criteria that fulfills for both block mountains and volcanic mountains is option (D) i.e both the type of mountains are formed at convergent as well as divergent plate boundaries.