The silica-oxygen tetrahedra is the building block of which chemical class of minerals?

Answer: Silicate minerals

Explanation:

Silicate minerals are the class of chemical minerals that make up 95% of the earth's crust. The reason for the existence of silicate minerals in large quantities in rocks that form the earth crust is because of how stable silicon is when it bonds together with oxygen. Examples of silicate or silicate minerals are Quartz, Olivine, Feldspar e. t. c.