Can someone explain abrasion, attrition, corrosion and hydraulic action?

Question

Can someone explain abrasion, attrition, corrosion and hydraulic action?

Answer 1

Hydraulic Action -  Like a hose being sprayed on a rock, the power chips away bits of the rock.

Corrosion - Chemicals eroding away the rock

Abrasion - Friction rubbing away the rocks, like little pebbles rubbing against the surface of a rock chipping bits off.

Attrition - As the rocks and pebbles are being swept along they bang against each other and they split up or little bits get knocked off, making them smaller and smaller.