Henry Moore was a British sculptor obsessed with form and shape in everything he observed. Sculpture is the art of carving, casting, modeling, or assembling materials into three-dimensional figures. There are two main types of sculpture - subtractive, which involves carving away material, and additive, which involves modeling or constructing. Sculptors use many different materials like stone, wood, clay, and metal, as well as modern materials like plastic and chocolate. Contemporary sculptors also work in constructed sculpture, assemblage, kinetic sculpture, and light sculpture.