It gets worn away by the sea because it is simply eroded which mean when water is moving fast the waves crash against the rock and bits fall off into the sea. when this happens the waves carry the pieces of rock away and they end up on a beach as sand or at the bottom of the ocean.
Erosion
Rocks wear away because slowly,wind/water take away tiny pieces of dust and slowly it gets worn away.
"erosion"
Rocks are worn away through the process of weathering and erosion. Weathering is the breaking down of rocks into smaller pieces while erosion is what carries the rock to new places. Rocks can be worn away by water, ice, and wind. Examples of this are abrasion, ice wedging, and dissolution.
The process of rocks being worn away by other rocks and sand is called "abrasion." This occurs when particles are transported by wind, water, or ice, and they collide with and wear down the surfaces of rocks. Over time, this can lead to smoother surfaces and the gradual erosion of rock formations.
Centuries of erosion by wind have worn away the rocks.
Erosion.
Weathering and erosion.
As slate is a metamorphic rock, it can't be worn easily. I t would be harder to wear than igneous or sedimentary rocks.
Rocks that have been worn away or broken up by chemical, biological, or physical processes are called "sedimentary rocks." These processes, known as weathering and erosion, lead to the breakdown of pre-existing rocks into smaller particles, which can then accumulate and eventually lithify into sedimentary formations. Examples of sedimentary rocks include sandstone, limestone, and shale.
Differential weathering
Intrusive igneous rocks are formed from magma that cools and solidifies beneath the Earth's surface. They are more resistant to weathering and erosion compared to surrounding rocks, which are often sedimentary or metamorphic in nature. Therefore, when the less resistant rocks are worn away, the intrusive igneous rocks are exposed at the surface.