Two things that characterize the practice of science are hypothesis and empirical evidence.
in what time in history are we talking about...
Answer:
The answer is - Diversity of Citizenship
Explanation:
Diversity of Citizenship exists when the opposing parties (plaintiff and defendant) involved in the case lawsuit are of different citizenship in either state or nationality including corporations with businesses in different states and the amount in controversy is above $75,000. For example, a citizen of Texas versus a citizen of New Jersey.
The answer is Human
While the other options are always affecting the ecosystems, humans have a greater affect than all of the above