Respiration and movement maybe? :)
Answer:
c. potential Hydrogen strips and written observations of stream water
Explanation is in the file
tinyurl.com/wtjfavyw
Processes operating in the Earth system take place on spatial scales varying from fractions of millimeters to thousands of kilometers, and on time scales that range from milliseconds to billions of years.
<span>Examples of instantaneous - breathing; rotation of the Earth; earthquake<span>Examples of long term - making coal; plate tectonics</span></span>
B. Fossil fuels is putting extra carbon monoxide in the air, affecting plant growth.
