Limestone.
acid rain
If the rock is a limestone it will react with it chemically.
Acid rain can damage rock or stone by dissolving the minerals that hold the rock or stone together, leading to erosion and weakening of the material. Over time, the surface of the rock or stone can become pitted and rough due to the chemical reactions with the acid in the rain.
The harmful gases produced from use rise and produce acid rain, the rain then falls. When the acid rain touches the rock it starts to break down the molecules in the rock, causing cracks to appear, leading to bits falling of. This called eroding of the rock.
An acid rain contain acids as HNO3, H2SO4, HCl.
Melting of rock or erosion
limescale
Definitely Sand stone!
It lands on the rocks and dissolves them.
in disinagrates deppending wat kind of rock it is \
granite and gabbro
Hills are made of solid rock which is not easily dissolved by acid rain. The rocks in hills are typically composed of minerals that are resistant to acidic corrosion. It would take a very long time for the chemical reactions in acid rain to slowly erode away a hill.