Buckminster fullerene, which looks like a football, is an allotropic form of

Buckminsterfullerene (C60) is a prominent allotrope of carbon. It consists of 60 carbon atoms arranged in a spherical structure composed of 20 hexagons and 12 pentagons, which closely resembles a soccer ball or football.

• It is named after the architect Richard Buckminster Fuller, whose geodesic domes share a similar geometric design.
• Carbon exhibits several allotropic forms, including diamond (a 3D tetrahedral network), graphite (layered hexagonal sheets), and graphene (a single layer of atoms).
• Unlike diamond and graphite, which are covalent network solids, fullerenes are discrete molecular forms of carbon.

Because the structure is composed entirely of carbon atoms covalently bonded to one another, Option C is the correct answer.