Question

Grazing and ecological systems 
  structure of ecological system

Answer 1

environment are the aggregate of all the external condition and influences affecting the life and development of an organism in its Natural Habitat the study of the ways in which community of plants and animals interact with one another and with their non living environment is called ecology. organisms is the basic unit of ecological Hierarchy

Answer 2

Answer:

Grazing or herbivory is the process by which animals consume plants to acquire energy and nutrients. ... Both the grazing process and associated managerial activities occur within ecological systems and are therefore subject to an identical set of ecological principles which govern system function.