Which one of the following rock groups would typically have the slowest rate of weathering?Group of answer choicesIgneousSedimentaryResidualMetamorphic

A. Igneous

Igneous rocks typically have the slowest rate of weathering among the rock groups. This is because they are formed from the cooling and solidification of magma or lava, which makes them generally more resistant to weathering processes. They are often composed of hard, crystalline minerals that do not easily break down. In contrast, sedimentary rocks are often more susceptible to weathering because they are composed of grains that can be loosened and carried away. Metamorphic rocks can also weather relatively quickly, especially if they contain minerals that are unstable at the Earth's surface. Residual rocks are already a product of weathering. Therefore, among the options provided, igneous rocks would typically have the slowest rate of weathering.