How does a suspension form

A supension is formed when two or more materials are insoulable so they rest on top of each other. For instance, sand and oil are insoulable (unable to be mixed together) so based on density, one rises above the other, making a suspension.

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Maybe haha

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.