Question

question 22(multiple choice worth 3 points)
(03.04 lc)
which of the following represents the region where molten magma rises to just underneath the surface of earth creates volcanic activity?
accretion
fault
hotspot
mid - ocean ridge

Explanation:

• Accretion: Refers to the process of growth by accumulation of material, not related to magma rising for volcanic activity.
• Fault: A fracture in the Earth's crust where blocks of rock have moved past each other, not directly about magma - related volcanic activity.
• Hotspot: A region in the mantle where heat causes magma to rise. When magma rises just underneath the Earth's surface, it can create volcanic activity. For example, the Hawaiian Islands are formed by hotspot activity.
• Mid - ocean ridge: While there is volcanic activity at mid - ocean ridges (due to seafloor spreading and magma upwelling), it is mainly associated with the creation of new oceanic crust at plate boundaries, not the general description of magma rising just underneath the surface as in the question.

Answer:

Hotspot