How does humidity affect living organisms?

Water is one of the most important components for cells. The amount of moisture determines the nature of all living organisms and plants in the area.
If the water in this area is in excess, then waterlogging of the soil occurs and marsh plants appear. Precipitation and its amount affect the type of vegetation. For example, small-leaved forests replace deciduous forests. Next comes the forest-steppe, followed by low-growing plants and the desert. Due to uneven rainfall, living organisms have to endure long droughts. For example, in the savannah, the nutrition of animals depends on the rainy season, since only at this time the herbs grow intensively.
The animals have adapted to endure the drought. For example, snakes and rodents take the moisture they need from food. Some organisms hibernate.