increase in earthquake/seismic activity

changes in land surface orientation and elevation

All of these choices are correct

formation of pyroclastic flow

increased gas emissions from a volcano

viscous to very viscous lava

explosive eruptions

dangerous volcanic hazards

mafic-intermediate lava compositions

Subduction zone Convergent boundaries where eruptions are explosive, fast, and damaging.

Along mid-ocean ridges where eruptions are slow, gentle, and oozing.

Lahars are only associated with stratovolcanoes and volcanic domes while pyroclastic flows are associated with shield volcanoes and cinder cones.

Lahars are only associated with shield volcanoes and cinder cones while pyroclastic flows are associated with stratovolcanoes and volcanic domes.

Lahars involves water and pyroclastic debris, while pyroclastic flows involve very hot gasses and pyroclastic debris, both flow down the flanks of the volcano. 

Lahars involves very hot gasses and pyroclastic debris, while pyroclastic flows involve very hot water and pyroclastic debris, both flow down the flanks of the volcano. 

The formation of a volcanic dome.

The formation of a volcanic caldera.

none of the above

their abundant ash layers spread out large distances.

the low viscosity of basaltic magma allows it to flow downhill for long distances.

they never erupt from the same place twice.

the layers flatten out due to tectonic forces. 

magma

H₂0

heat

Carbon dioxide

extrusive igneous rock

granite rock

metamorphic rock

intrusive igneous rock

Wholey 

Phaneritic 

Vesicular (vesicles) 

Pegmatitic