Answer is Biogeochemical cycles.
In an ecosystem biotic (living) abiotic (non-living) components constantly interact each other. During these interactions, there is a transfer of nutrients between living organisms and the non-living environment. Thus, there is recycling of inorganic matter between living organisms and their non-living environment. This cycling of matter is called biogeochemical cycles.
B) Primary is where there is nothing no rock or soil
Change in the external Environment may resulted in the changing in the population of beetles.
By interfering with the absorption of BILE in the intestine. Bile contains cholesterol, if it absorbed from the intestines it will increase the level of cholesterol in the blood stream. So, the viscous fiber stop this by sequestering the bile acids.