In the Earth's crust, silicates are the most abundant group of minerals. Silicates make up about 90% of the Earth's crust composition. This high abundance is due to the prevalence of silicon and oxygen, which are the most abundant elements in the Earth's crust.
Silicates are compounds composed of silicon and oxygen atoms, often combined with other elements like aluminum, magnesium, or iron. They form the building blocks of many minerals found in the Earth's crust, such as quartz, feldspar, and mica.
On the other hand, nonsilicates are minerals that do not contain silicon and oxygen as their primary components. While nonsilicates do exist in the Earth's crust, they are not as abundant as silicates. Nonsilicate minerals include carbonates (like calcite), sulfates (like gypsum), and oxides (like hematite).
Therefore, in the Earth's crust, silicates are much more abundant compared to nonsilicates. So, the correct answer to the question is:
B. Silicates
