Here's why:

* Sediments: These are the broken-down pieces of rock, ranging in size from tiny particles to large boulders. They can be made up of different minerals, depending on the original rock.

* Minerals: These are naturally occurring solid substances with a defined chemical composition and crystal structure. They make up rocks and are often released as rocks erode.

So, erosion is the process of breaking down rocks into smaller sediments and releasing individual mineral grains.