Answer:
All of the above
Explanation:
The organic matter decomposes and reduces dissolved oxygen levels making it inhabitable for the sea animals. Dissolved oxygen is the oxygenmeasured in milligrams per liter. Aquatic animals survive on a certain minimum level of dissolved oxygen, but Stagnant water contains much fresh organic matter causing the aquatic system to have insufficient amount of dissolved oxygen and therefore be unable to support life.
II. Decomposition of organic matter releases great quantities of nutrients. This causes break down of dead organic materials and release nutrients into the water by especially bacteria and fungi releasing releases great quantities of nutrients causing Eutrophications leading to the water body to overly enriched with minerals and nutrients which induce excessive growth of algae resulting in oxygen depletion which is unsafe for aquatic life. III. Pathogenic organisms are carried into surface waters.
Water is often polluted by domestic wastewater and contains a variety of pathogenic organisms, including viruses, bacteria,which is an indicator for the threat of aquatic life.
I believe the answer is: Changes in speed
Average people tend to become more focus and accelerate our effort when we're on the brink of finishing a certain goal.
So in the scenario above, when a sudden tense/increased movement happen in our body the researchers could perceive it as we're on the brink of finishing an action.
Improvements in roads and canals, which is paid for by the money made from the tariff, With the improvement in the roads and canals, the United States can grow even more, becoming a powerful, wealthy, and self-sufficient nation.
Answer:Examples of valuable nonmetallic minerals extracted by mining are sand, gravel, phosphate
Explanation:
Nonmetallic minerals refers to those chemical elements that cannot be used to make any other products after they have been melted. Examples of these minerals are clay, limestone,marble , sand and gravel. They are called non metallic because they can not conduct electricity , can not conduct thermal power, they lack luster,rigor and malleability.
The non metallic metals are mostly used to make cements , lime and glass.
They can also be used in sanitary ,tableware and decorative products.
Several steps are followed in making certain products from these minerals such as grinding,cutting,mixing,shaping and heating.
