The Electrostatic Force of atoms allows for which kind of attraction
between atoms and molecules

Intramolecular forces

Explanation:

I think that the force you are trying to get here are "intramolecular" forces which are the forces between atoms and molecules. These are relatively weak forces and are caused by attraction between the electrons of one atom and the nucleus of another (and vice versa).

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.