A model of methanol (CH₃OH) consists of one carbon atom (C), four hydrogen atoms (H), and one oxygen atom (O).
According to the color coding provided:
- Carbon (C) is represented by a gray sphere.
- Hydrogen (H) is represented by white spheres.
- Oxygen (O) is represented by a red sphere.
Thus, the correct description of a methanol model would be:
one gray sphere, four white spheres, one red sphere.
So, the correct option is:
one gray sphere, four white spheres, one red sphere.