Based on duration or persistence how diseases are categorized

The answer is that they are classified into two cqategories; i.e Chronic andf Acute diseases
Chronic diseases are diseases that are persistent or otherwise long lasting. The term chronic is usually applied when the course of the disease lasts for more than three months. They develop gradually out of habitual diet, posture or other condition. They continue beyond expected period of recovery. Examples are; Asthma, Heart diseases, kidney disease, frequent migraines e.t.c

Acute diseases are diseases with rapid onset/or a short course. These diseases start suddenly as reaction to an injury or something else. Examples are; burns, heartburn, strep throat e.t.c

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.