Answer the following question given this paragraph: 

Each type of rock weathers in its own way. Certain types of rock are very resistant to weathering. Igneous rocks tend to weather slowly because they are hard. Water cannot easily penetrate them. Granite is a very stable igneous rock. Other types of rock are easily weathered because they dissolve easily in weak acids. Limestone is a sedimentary rock that dissolves easily. When softer rocks wear away, the more resistant rocks form ridges or hills.


Q: Hard igneous rocks and easily dissolved sedimentary rocks respond very differently to what natural force?

 Choices:

- gravity

- sunlight

- evaporation

- weathering

A:
weathering
