<em>"The number of organisms which interbreed freely and can produce an offspring are called as species."</em>
<u>Environmental changes:</u>
<em>The changes in the various factors of the environment i.e temperature and availability of resources like food and water are termed as environmental changes in simple words.</em>
Explanation:
<u>If temperature rises</u>: Now, there are certain organisms which can not resists the change in temperature either to a very high point or to low value freezing points, as the organism needs the optimum amount of temperature to process is cellular functions. I.e for humans if the temperature some how increase in a specific area, then they will surely migrate to the area of optimum level to survive.Along with if they live in that area specially for humans there skin texture changes and there body cellular process becomes more responsive and active to deal with high temperature, as thermo-regulation process is done to remove extra water from the body.
If the number of producers decrease(number of plant) lack of food: All the beings are dependent upon food produced by the producers if there number decreases then, this condition will be very alarming for the organisms to survive in and they will try to travel to the region where the number of producers are high in number.
<u>If there is less water:</u> Human beings are composed of about more then 60% percent of water and they need water as a medium for transportation too i.e important for both animals and plants. As it is basic necessity for life to persists on planet earth. The specie will try not lose as much water and there will be less sweating in the body structures of the beings.
One of the challenges that scientists face when classifying a new fossil is that any tiny detail is all that separates one species from another. Further exploration is required to identify another set of characteristics that may help in deciding which organism belongs or create a new class.
answer should be "making water hypoxic for organisms". reason is because the runoff from these treatment plants are filled with nutrients, which will cause eutrophication. eutrophication is excessive algae sprouts which create more DO but then later becomes all used up when they decompose, making it so other organisms have no oxygen.
