Answer:
A and D
Science has to be based off of facts and evidence, not bias or tradition.
I believe the answer is limestone..
A LOSS OF DISSOLVED OXYGEN IN THE WATER is the primary and direct cause of death of aquatic animals during eutrophication or what is also known as hypertrophication.
This is the enrichment of a water body with excessive chemical nutrients which can be a problem in marine habitats, as it can cause algal blooms. With this is the occurrence of dense growth of plant life and death of animal life from lack of oxygen.
A diverse set of ecosystems means that there will be a wide variety of selection pressures exerted on the organisms. Therefore, natural selection will act to bring out the best suited traits for that particular ecosystem. The more the ecosystems are diverse, the more will be the difference between the traits between the organisms that will survive. This means that the biodiversity will increase.
<span>Carbon is the answer you are looking for. However, not all carbon containing molecules are organic. Examples being carbon oxides such as CO (carbon monoxide) and CO2 (carbon dioxide). Some Chemists classify organic compounds as having a C-H bond present but this is not completely correct as this excludes molecules like benzenehexol (benzene with an alcohol group on each carbon rather than a hydrogen) which are considered organic. A solid definition of an organic molecule is not certainly agreed. Just remember that: all organic molecules contain carbon but not all carbon containing molecules are organic.</span>
