Question

 Shield volcanoes usually have a_____________ shape, _________slope, and a _____________composition.

Answer 1

Shield volcanoes are typically tall and broad, with flat, rounded shapes. They typically have a 5°-10° slope, and are typically made by lava flowing at a low viscosity (lava flowing easily), and their broad profile is typically built with flow after flow of relatively basaltic lava issuing from vents or fissures on the surface.

I hope this helps, I got a bit confused on the composition part as well.