Our experience of objects in the natural world often leads us to assume that a large object will be heavy, but in fact this is not necessarily the case. this element of art is called

Our experience of objects in the natural world often leads us to assume that a large object will be heavy, but in fact this is not necessarily the case. this element of art is called TEXTURE.

Among the elements of art, texture is the most viable choice. Texture have 4 different types but one of its type is the actual texture. Actual texture is the texture we feel when we touch an object. 

The perception of a large object being heavy is based on how we encountered large objects in our daily lives. Majority of large objects we handled are heavy. Thus, the assumption that large objects are heavy.

Opposition of two melodic ideas is the  right answer