Explain why a liquid can flow whilst a solid retains its shape.

Probably because the particles that make up a solid are held in their place by the extremely strong forces of attraction
While in a liquid the forces of attraction between the particles are a bit weaker as compared to solids therefore allowing the liquid to flow and take the shape of its container

Ibelieve the answer is d

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.