Respuesta :

Answer:

See below

Explanation:

1) Top left box

  • Atom (As it points to only Cl atom)

2) Top right box

  • molecules (more than one atom)

3) Bottom left box

  • repeating atom group (as there are many KCl groups)

4) Bottom right box

  • extended structure (remaining option)

1st box is atom

2nd box is molecule

3rd box repeating atoms

4th group extended structure of CH_4

  • KCL is molecule
  • CH_4 is molecule
  • Cl is atom