Experts in study and predict the changes to the human population. One pattern of change to the population of a country is called the , and involves drastic changes to both birthrate and death rate.

c should be the answer

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.