I think it is all of the above but you might want a second opinion.
Water is stored mainly in the central vacoule of a plant cell.
Enzymes act as catalysts that remain unmodified as they increase the rate of a chemical reaction.
The correct answer is option (a). Parent material
The soil horizon refers to distinct layers of the soils, which are parallel to one another, but have a different composition from the layer present above and below to it.
The soil horizon can be divided into four different layers. First one is organic layer, which is the topmost layer, below this layer second layer of topsoil is present. Below top soil, subsoil is present. Below subsoil, the bottom most horizon parent material is present.
Answer:
between 20,000 and 25,000
