This is the cycling of nutrients among soil, litter, plant roots, and above-ground plant parts.

Internal Cycling

Explanation:

Internal cycling starts when the nutrients transform into ecosystems. The plants through their roots take the necessary ingredients and built them in the tissues. When tissues grow, the nutrients go back to the ground in the form of dead organic matter.

Microbes transform the organic nutrients into minerals, which are again available to the plants.

for the points

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.