Answer:
The force of attraction between two different molecules
Step-by-step explanation:
A great example of this is transport of water in plants.
As the water molecules travel up the xylem, there are forces of adhesion and cohesion that are present.
Cohesion is the force of attraction due to hydrogen bonds, of the water molecules to each other. Between one water molecule and another water molecule.
Adhesion is the force of attraction due to hydrogen bonds, of the water molecules being attracted to another object or surface, in this case, the wall of the xylem.