Question

What are the two kinds of interactions of water molecules that allow water to travel upward in plants? What other physical processes aid in water transport to tops of trees?

Answer 1

This process helps to bring the water up to the roots. It can bring water upwards only to some extent but after that it is unable to overcome the gravitational force. Beyond that, two other forces work to get the water to all the leaves and branches. These forces transport water to distant leaves by the plant's xylem.

Complete answer:
Capillary action facilitates transport of water upward into the roots. It is crucial for moving water and all of the matters that are mixed with it around all the parts of the plant.
Capillary action happens due to the stickiness of water, which occurs due to the forces of cohesion (water molecules tend to remain close to each other) and adhesion (water molecules are drawn and stick to additional materials).
A rising force on the liquid at the ends will be caused by adhesion of water to the walls of the part of the plant and will result in a meniscus which goes upward. The surface tension plays an important role in holding the surface intact. When the adhesion to the walls is greater than the cohesive forces among the liquid molecules the capillary action happens. The altitude to which capillary action will take water in a uniform circular tube is restricted by surface tension and gravity.
Other physical methods that help in water transport to tops of trees are:
Transpiration pull: A biological procedure in which the force of pulling is generated within the xylem tissue.
Root pressure: Force that facilitates to drive fluids up into the water-handling vessels (xylem).
Capillary action: The process of a liquid gushing in narrow spaces with no support of external forces like gravity.

Note:
Adhesion and cohesion are intermolecular forces that act between two bodies. Several occurrences can be described in terms of cohesion and adhesion. Cohesion causes the surface tension in liquids. Capillary action is the result of a combination of adhesive and cohesive forces. Strong cohesive forces between the C-atoms of diamonds made it hard.