Answer :
Answer: d. top soil
Topsoil is used to provide nutrients to growing plants, which in turn provide food for other organisms.
Explanation:
Topsoil is known to be outermost and upper layer of the soil with high organic matter and nutrients which are formed by the decaying of organic matters and slow weathering of rock over a thousand years. It is made up of organic matter, water, mineral particles and serves as major resources for the growth of plant.
Answer:
D. Topsoil
Explanation:
Topsoil is the outermost layer of soil and it has the highest concentration of organic matter and microorganisms; it is where most of the Earth's biological soil activity occurs. Moreover, topsoil is composed of mineral particles, organic matter, water, and air. Plants generally concentrate their roots in and obtain most of their vital nutrients from this layer.