All of those can potentially harm the earth. Human activity is a cause of pollution, and pollution is the cause of acid rain to some extent.
Answer:
present
Explanation:
Otherwise the only similarity is that they are organelles, and can generate themselves.
Answer:
Ecological and ethological approaches to the study of behaviour. The natural history approach of Darwin and his predecessors gradually evolved into the twin sciences of animal ecology, the study of the interactions between an animal and its environment, and ethology, the biological study of animal behaviour.
