which type of volcanic mountain has wide, gentle slopes?\nrift\nshield\ncomposite\ncinder cone

Brief Explanations:

Shield volcanoes are characterized by their wide, gentle - sloping profiles due to the low - viscosity lava that spreads out over large areas during eruptions. Rift is a type of geological feature related to plate boundaries, not a type of volcanic mountain with gentle slopes. Composite volcanoes have steep slopes due to the alternating layers of lava and ash. Cinder cone volcanoes have relatively steep sides made up of loose pyroclastic material.

Answer:

B. shield