Individual lava flows are normally only a few feet thick, but over a l

Individual lava flows are normally only a few feet thick, but over a long period of time, repeated flows may build up a volcano. Such volcanoes are termed as :

Shield volcano
Composite volcano
Strato-volcano
Cinder-cone volcano
This question was previously asked in
UPSC CDS-1 – 2022
Such volcanoes are termed as Shield volcano.
The description “Individual lava flows are normally only a few feet thick, but over a long period of time, repeated flows may build up a volcano” and the implied shape resulting from such flows points to a shield volcano. Shield volcanoes are formed by effusive eruptions of low-viscosity basaltic lava that spreads out thinly and widely, building a broad, gently sloping cone resembling a warrior’s shield.
Composite volcanoes (or stratovolcanoes) are built from alternating layers of viscous lava, ash, and volcanic debris, resulting in steeper, conical shapes and often explosive eruptions. Cinder-cone volcanoes are the simplest type, formed by loose pyroclastic material (cinders) ejected from a single vent, resulting in steep slopes but relatively small size.