Which of these is a supporting service - a service on which ecosystems
depend?
o
a. providing building materials
o
b. raising livestock
o
c. recycling nutrients
o
d. providing national parks

The correct option is C. Recycling nutrients

Explanation:

The nature benefits the humans in numerous ways. The benefits which the environment and all the natural ecosystems present have on humans is termed as ecosystem services. For example, the forest ecosystem is a natural ecosystem that benefits humans in numerous ways including the provision of wood for making houses etc.

Supporting services can be described as an ecosystem service by which essential components or services are continuously provided by the natural ecosystems to the humans. For example, recycling of nutrients.  

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.