A. Temperature increases
(just think of global warming and how pollution is making the earth warmer)
The beginning of cultivation is regarded as a landmark in the history of human progress because it provides opportunities to manage nature and the environment in return to earn their livelihoods.
<h3>What is Cultivation?</h3>
Cultivation may be defined as the process of preparing lands and growing crops by the farmers for the huge human population as well as animals. It is an agricultural practice.
The beginning of cultivation delivers an idea to humans through which they can sustain themselves by earning income. The activity of cultivation was initiated in the Neolithic age. Since then, it creates a lot of opportunities for farmers in order to make their progress.
Therefore, the alteration of foods from food products represents the initiation of cultivation that is considered a landmark in the history of human progress.
To learn more about Cultivation, refer to the link:
brainly.com/question/1188946
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Answer:
Phosphorus is essential for growth of plants and other organisms. When concentration of phosphorus mostly from high breeding rate e.g., pigs, cattle etc. rise in water it causes severe growth of plants and algae as well as phytoplanktons. As a results layers of phosphorus start to release phosphorus as well due to positive gradient. These reactions in water are iron-redox reactions that are crucial for the release of phosphorus.
When too much phosphorus accumulates, it produces a degrading growth feedback in plants, algae and phytoplanktons that then shift toward excessive nitrogen available from fertilizers and cause a flip from P to N. Cynobacteria now dominates and denitrification as well as nitrification takes place simultaneously.
Severe eutrophication induces hypoxia in water that cause a major damage to plants biodiversity in the environment.
Salt concentration is the factor among the following factors given in the question that does not vary between a fast flowing river and a pond that receives no water input. The correct option among all the options that are given in the question is the second option. I hope the answer comes to your help.
