The answer is Human
While the other options are always affecting the ecosystems, humans have a greater affect than all of the above
Answer: The atmosphere is the superhighway in the sky that moves water everywhere over the Earth. Water at the Earth's surface evaporates into water vapor which rises up into the sky to become part of a cloud that will float off with the winds, eventually releasing water back to Earth as precipitation.
Explanation:
Countries trade with each other when, on their own, they do not have the resources, or capacity to satisfy their own needs and wants. By developing and exploiting their domestic scarce resources, countries can produce a surplus, and trade this for the resources they need. You can integrate all of this into your question. Hope this helped.
